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The osprey (''Pandion haliaetus''), , also called sea hawk, river hawk, and fish hawk, is a diurnal, fish-eating
bird of prey Birds of prey or predatory birds, also known as raptors, are hypercarnivorous bird species that actively hunt and feed on other vertebrates (mainly mammals, reptiles and other smaller birds). In addition to speed and strength, these predat ...
with a
cosmopolitan range In biogeography, cosmopolitan distribution is the term for the range of a taxon that extends across all or most of the world in appropriate habitats. Such a taxon, usually a species, is said to exhibit cosmopolitanism or cosmopolitism. The extr ...
. It is a large raptor reaching more than in length and across the wings. It is brown on the upperparts and predominantly greyish on the head and underparts. The osprey tolerates a wide variety of
habitat In ecology, the term habitat summarises the array of resources, physical and biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species habitat can be seen as the physical ...
s, nesting in any location near a body of water providing an adequate food supply. It is found on all continents except Antarctica, although in South America it occurs only as a non-breeding migrant. As its other common names suggest, the osprey's diet consists almost exclusively of fish. It possesses specialised physical characteristics and exhibits unique behaviour to assist in hunting and catching
prey Predation is a biological interaction where one organism, the predator, kills and eats another organism, its prey. It is one of a family of common feeding behaviours that includes parasitism and micropredation (which usually do not kill ...
. As a result of these unique characteristics, it has been given its own taxonomic
genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nom ...
, ''Pandion'', and
family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...
, Pandionidae.


Taxonomy

The osprey was described by
Carl Linnaeus Carl Linnaeus (; 23 May 1707 – 10 January 1778), also known after his Nobility#Ennoblement, ennoblement in 1761 as Carl von Linné#Blunt, Blunt (2004), p. 171. (), was a Swedish botanist, zoologist, taxonomist, and physician who formalise ...
under the name ''Falco haliaeetus'' in his landmark 1758 10th edition of ''Systema Naturae''. The genus, ''Pandion'', is the sole member of the family Pandionidae, and used to contain only one species, the osprey (''P. haliaetus''). The genus ''Pandion'' was described by the French zoologist
Marie Jules César Savigny Marie Jules César Lelorgne de Savigny (; 5 April 1777 – 5 October 1851) was a French zoologist. Savigny was born at Provins. In 1798 he travelled to Egypt with the Emperor Napoleon as part of the French scientific expedition to that country ...
in 1809. It has always presented something of a riddle to taxonomists, but here it is treated as the sole living member of the family Pandionidae, and the family listed in its traditional place as part of the order
Falconiformes The order Falconiformes () is represented by the extant family Falconidae (falcons and caracaras) and a handful of enigmatic Paleogene species. Traditionally, the other bird of prey families Cathartidae (New World vultures and condors), Sagitt ...
. Other schemes place it alongside the hawks and eagles in the family
Accipitridae The Accipitridae is one of the three families within the order Accipitriformes, and is a family of small to large birds with strongly hooked bills and variable morphology based on diet. They feed on a range of prey items from insects to medium-s ...
—which itself can be regarded as making up the bulk of the order
Accipitriformes The Accipitriformes (; from Latin ''accipiter''/''accipitri-'' "hawk", and New Latin ''-formes'' "having the form of") are an order of birds that includes most of the diurnal birds of prey, including hawks, eagles, vultures, and kites, but not f ...
or else be lumped with the Falconidae into
Falconiformes The order Falconiformes () is represented by the extant family Falconidae (falcons and caracaras) and a handful of enigmatic Paleogene species. Traditionally, the other bird of prey families Cathartidae (New World vultures and condors), Sagitt ...
. The Sibley-Ahlquist taxonomy has placed it together with the other diurnal raptors in a greatly enlarged
Ciconiiformes Storks are large, long-legged, long-necked wading birds with long, stout bills. They belong to the family called Ciconiidae, and make up the order Ciconiiformes . Ciconiiformes previously included a number of other families, such as herons a ...
, but this results in an unnatural paraphyletic classification. The osprey is unusual in that it is a single living species that occurs nearly worldwide. Even the few subspecies are not unequivocally separable. There are four generally recognised subspecies, although differences are small, and
ITIS The Integrated Taxonomic Information System (ITIS) is an American partnership of federal agencies designed to provide consistent and reliable information on the taxonomy of biological species. ITIS was originally formed in 1996 as an interagen ...
lists only the first three. * ''Pandion haliaetus haliaetus'' – (
Linnaeus Carl Linnaeus (; 23 May 1707 – 10 January 1778), also known after his ennoblement in 1761 as Carl von Linné Blunt (2004), p. 171. (), was a Swedish botanist, zoologist, taxonomist, and physician who formalised binomial nomenclature, the ...
, 1758)
: the nominate subspecies, occurring in the
Palearctic realm The Palearctic or Palaearctic is the largest of the eight biogeographic realms of the Earth. It stretches across all of Eurasia north of the foothills of the Himalayas, and North Africa. The realm consists of several bioregions: the Euro-Sib ...
. * ''P. haliaetus carolinensis'' – (
Gmelin Gmelin may refer to: * Gmelin's test, a chemical test * Gmelin database, a German handbook/encyclopedia of inorganic compounds initiated by Leopold Gmelin People * Carl Christian Gmelin (1762–1837), German botanist, author of ''Flora Badensis ...
, 1788)
: mainland Americas. This form is larger, darker bodied and has a paler breast than the type of the first description. * ''P. haliaetus ridgwayi'' – Maynard, 1887: Caribbean islands. This form has a very pale head and breast compared with nominate ''haliaetus'', with only a weak eye mask. It is non-migratory. Its scientific name commemorates American ornithologist
Robert Ridgway Robert Ridgway (July 2, 1850 – March 25, 1929) was an American ornithologist specializing in systematics. He was appointed in 1880 by Spencer Fullerton Baird, secretary of the Smithsonian Institution, to be the first full-time curator of bi ...
. * '' P. haliaetus cristatus'' – (
Vieillot Louis Pierre Vieillot (10 May 1748, Yvetot – 24 August 1830, Sotteville-lès-Rouen) was a French ornithologist. Vieillot is the author of the first scientific descriptions and Linnaean names of a number of birds, including species he collect ...
, 1816)
: coastline and some large rivers of Australia and
Tasmania ) , nickname = , image_map = Tasmania in Australia.svg , map_caption = Location of Tasmania in AustraliaCoordinates: , subdivision_type = Country , subdi ...
. The smallest and most distinctive subspecies, also non-migratory. Some authorities have assigned it full species status as '' Pandion cristatus'', known as the eastern osprey.


Fossil record

To date there have been two extinct species named from the fossil record. ''
Pandion homalopteron Pandion may refer to: In Greek mythology * Pandion (mythology) for mythological characters named Pandion. ** Pandion I, a legendary king of Athens, father of the sisters Procne and Philomela. **Pandion II, a legendary king of Athens, father of th ...
'' was named by
Stuart L. Warter Stuart may refer to: Names *Stuart (name), a given name and surname (and list of people with the name) Automobile * Stuart (automobile) Places Australia Generally *Stuart Highway, connecting South Australia and the Northern Territory Northe ...
in 1976 from fossils of Middle Miocene,
Barstovian The Barstovian North American Stage on the geologic timescale is the North American faunal stage according to the North American Land Mammal Ages chronology (NALMA), typically set from 16,300,000 to 13,600,000 years BP, a period of . It is usu ...
age, found in marine deposits in the southern part of
California California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the m ...
. The second named species ''
Pandion lovensis Pandion may refer to: In Greek mythology * Pandion (mythology) for mythological characters named Pandion. ** Pandion I, a legendary king of Athens, father of the sisters Procne and Philomela. **Pandion II, a legendary king of Athens, father of th ...
'', was described in 1985 by Jonathan J. Becker from fossils found in
Florida Florida is a state located in the Southeastern region of the United States. Florida is bordered to the west by the Gulf of Mexico, to the northwest by Alabama, to the north by Georgia, to the east by the Bahamas and Atlantic Ocean, and to ...
and dating to the latest Clarendonian and possibly representing a separate lineage from that of ''P. homalopteron'' and ''P. haliaetus''. A number of claw fossils have been recovered from Pliocene and Pleistocene sediments in Florida and
South Carolina )'' Animis opibusque parati'' ( for, , Latin, Prepared in mind and resources, links=no) , anthem = " Carolina";" South Carolina On My Mind" , Former = Province of South Carolina , seat = Columbia , LargestCity = Charleston , LargestMetro = ...
. The oldest recognized family Pandionidae fossils have been recovered from the Oligocene age
Jebel Qatrani Formation The Jebel Qatrani Formation (also Gebel Qatrani) is a palaeontological and geologic formation located in the Faiyum Governorate of central Egypt. Conformably overlying the Qasr el Sagha Formation. It is exposed namely between the Jebel Qatrani ...
, of
Faiyum Faiyum ( ar, الفيوم ' , borrowed from cop,  ̀Ⲫⲓⲟⲙ or Ⲫⲓⲱⲙ ' from egy, pꜣ ym "the Sea, Lake") is a city in Middle Egypt. Located southwest of Cairo, in the Faiyum Oasis, it is the capital of the modern Faiyum ...
,
Egypt Egypt ( ar, مصر , ), officially the Arab Republic of Egypt, is a transcontinental country spanning the northeast corner of Africa and southwest corner of Asia via a land bridge formed by the Sinai Peninsula. It is bordered by the Medit ...
. However they are not complete enough to assign to a specific genus. Another Pandionidae claw fossil was recovered from
Early Oligocene The Rupelian is, in the geologic timescale, the older of two ages or the lower of two stages of the Oligocene Epoch/ Series. It spans the time between . It is preceded by the Priabonian Stage (part of the Eocene) and is followed by the Chattian ...
deposits in the
Mainz Mainz () is the capital and largest city of Rhineland-Palatinate, Germany. Mainz is on the left bank of the Rhine, opposite to the place that the Main joins the Rhine. Downstream of the confluence, the Rhine flows to the north-west, with Ma ...
basin, Germany, and was described in 2006 by
Gerald Mayr Gerald Mayr is a German palaeontologist who is Curator of Ornithology at the Senckenberg Research Institute in Frankfurt am Main, Hesse. He has published extensively on fossil birds, especially the Paleogene avifauna of Europe. He is an expert on ...
.


Etymology

The genus name '' Pandion'' derives from ''Pandíōn'' , the
mythical Myth is a folklore genre consisting of narratives that play a fundamental role in a society, such as foundational tales or origin myths. Since "myth" is widely used to imply that a story is not objectively true, the identification of a narrati ...
Greek
king of Athens Before the Athenian democracy, the tyrants, and the Archons, the city-state of Athens was ruled by kings. Most of these are probably mythical or only semi-historical. The following lists contain the chronological order of the title King of Athens ( ...
and grandfather of
Theseus Theseus (, ; grc-gre, Θησεύς ) was the mythical king and founder-hero of Athens. The myths surrounding Theseus his journeys, exploits, and friends have provided material for fiction throughout the ages. Theseus is sometimes describ ...
,
Pandion II In Greek mythology, Pandion II ( or ; Ancient Greek: Πανδίων) was a legendary King of Athens, the son and heir of King Cecrops II and his wife Metiadusa, daughter of Eupalamus. Family Pandion was the father of Aegeus, Pallas, Nisos, Lycu ...
. Although Pandion II was not used to name a
bird of prey Birds of prey or predatory birds, also known as raptors, are hypercarnivorous bird species that actively hunt and feed on other vertebrates (mainly mammals, reptiles and other smaller birds). In addition to speed and strength, these predat ...
, Nisus, a king of Megara, was used for the genus. The species name ''haliaetus'' ( la, haliaeetus) comes from
Greek Greek may refer to: Greece Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group. *Greek language, a branch of the Indo-European language family. **Proto-Greek language, the assumed last common ancestor ...
''haliáetos'' "sea-eagle" (also ''haliaietos'') from the combining form ''hali-'' of ''hals'' "sea" and ''aetos'', "eagle". The origins of ''osprey'' are obscure; the word itself was first recorded around 1460, derived via the
Anglo-French Anglo-French (or sometimes Franco-British) may refer to: *France–United Kingdom relations *Anglo-Norman language or its decendants, varieties of French used in medieval England *Anglo-Français and Français (hound), an ancient type of hunting d ...
''ospriet'' and the
Medieval Latin Medieval Latin was the form of Literary Latin used in Roman Catholic Western Europe during the Middle Ages. In this region it served as the primary written language, though local languages were also written to varying degrees. Latin functione ...
''avis prede'' "bird of prey," from the
Latin Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power of the ...
''avis praedae'' though the
Oxford English Dictionary The ''Oxford English Dictionary'' (''OED'') is the first and foundational historical dictionary of the English language, published by Oxford University Press (OUP). It traces the historical development of the English language, providing a co ...
notes a connection with the
Latin Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power of the ...
''ossifraga'' or "bone breaker" of
Pliny the Elder Gaius Plinius Secundus (AD 23/2479), called Pliny the Elder (), was a Roman author, naturalist and natural philosopher, and naval and army commander of the early Roman Empire, and a friend of the emperor Vespasian. He wrote the encyclopedic ' ...
. However, this term referred to the
bearded vulture The bearded vulture (''Gypaetus barbatus''), also known as the lammergeier and ossifrage, is a very large bird of prey and the only member of the genus ''Gypaetus''. Traditionally considered an Old World vulture, it actually forms a separate mi ...
.


Description

The osprey differs in several respects from other diurnal birds of prey. Its toes are of equal length, its tarsi are reticulate, and its talons are rounded, rather than grooved. The osprey and owls are the only raptors whose outer toe is reversible, allowing them to grasp their prey with two toes in front and two behind. This is particularly helpful when they grab slippery fish. The osprey is in weight and in length with a wingspan. It is, thus, of similar size to the largest members of the ''
Buteo ''Buteo'' is a genus of medium to fairly large, wide-ranging raptors with a robust body and broad wings. In the Old World, members of this genus are called "buzzards", but " hawk" is used in the New World (Etymology: ''Buteo'' is the Latin na ...
'' or '' Falco'' genera. The subspecies are fairly close in size, with the nominate subspecies averaging , ''P. h. carolinensis'' averaging and ''P. h. cristatus'' averaging . The wing chord measures , the tail measures and the tarsus is . The upperparts are a deep, glossy brown, while the breast is white and sometimes streaked with brown, and the underparts are pure white. The head is white with a dark mask across the eyes, reaching to the sides of the neck. The irises of the eyes are golden to brown, and the transparent nictitating membrane is pale blue. The bill is black, with a blue
cere The beak, bill, or rostrum is an external anatomical structure found mostly in birds, but also in turtles, non-avian dinosaurs and a few mammals. A beak is used for eating, preening, manipulating objects, killing prey, fighting, probing for food ...
, and the feet are white with black talons. On the underside of the wings the wrists are black, which serves as a field mark. A short tail and long, narrow wings with four long, finger-like feathers, and a shorter fifth, give it a very distinctive appearance. The sexes appear fairly similar, but the adult male can be distinguished from the female by its slimmer body and narrower wings. The breast band of the male is also weaker than that of the female, or is non-existent, and the underwing coverts of the male are more uniformly pale. It is straightforward to determine the sex in a breeding pair, but harder with individual birds. The juvenile osprey may be identified by buff fringes to the plumage of the upperparts, a buff tone to the underparts, and streaked feathers on the head. During spring, barring on the underwings and flight feathers is a better indicator of a young bird, due to wear on the upperparts. In flight, the osprey has arched wings and drooping "hands", giving it a gull-like appearance. The call is a series of sharp whistles, described as ''cheep, cheep'' or ''yewk, yewk''. If disturbed by activity near the nest, the call is a frenzied ''cheereek''!


Distribution and habitat

The osprey is the second most widely distributed raptor species, after the peregrine falcon, and is one of only six land-birds with a cosmopolitan distribution. It is found in temperate and tropical regions of all continents, except
Antarctica Antarctica () is Earth's southernmost and least-populated continent. Situated almost entirely south of the Antarctic Circle and surrounded by the Southern Ocean, it contains the geographic South Pole. Antarctica is the fifth-largest cont ...
. In North America it breeds from
Alaska Alaska ( ; russian: Аляска, Alyaska; ale, Alax̂sxax̂; ; ems, Alas'kaaq; Yup'ik: ''Alaskaq''; tli, Anáaski) is a state located in the Western United States on the northwest extremity of North America. A semi-exclave of the U.S. ...
and Newfoundland south to the
Gulf Coast The Gulf Coast of the United States, also known as the Gulf South, is the coast, coastline along the Southern United States where they meet the Gulf of Mexico. The list of U.S. states and territories by coastline, coastal states that have a shor ...
and
Florida Florida is a state located in the Southeastern region of the United States. Florida is bordered to the west by the Gulf of Mexico, to the northwest by Alabama, to the north by Georgia, to the east by the Bahamas and Atlantic Ocean, and to ...
, wintering further south from the southern United States through to Argentina. It is found in summer throughout Europe north into Ireland, Scandinavia, Finland and Great Britain though not Iceland, and winters in
North Africa North Africa, or Northern Africa is a region encompassing the northern portion of the African continent. There is no singularly accepted scope for the region, and it is sometimes defined as stretching from the Atlantic shores of Mauritania in ...
. In Australia it is mainly
sedentary Sedentary lifestyle is a lifestyle type, in which one is physically inactive and does little or no physical movement and or exercise. A person living a sedentary lifestyle is often sitting or lying down while engaged in an activity like soci ...
and found patchily around the coastline, though it is a non-breeding visitor to eastern
Victoria Victoria most commonly refers to: * Victoria (Australia), a state of the Commonwealth of Australia * Victoria, British Columbia, provincial capital of British Columbia, Canada * Victoria (mythology), Roman goddess of Victory * Victoria, Seychelle ...
and
Tasmania ) , nickname = , image_map = Tasmania in Australia.svg , map_caption = Location of Tasmania in AustraliaCoordinates: , subdivision_type = Country , subdi ...
. There is a gap, corresponding with the coast of the
Nullarbor Plain The Nullarbor Plain ( ; Latin: feminine of , 'no', and , 'tree') is part of the area of flat, almost treeless, arid or semi-arid country of southern Australia, located on the Great Australian Bight coast with the Great Victoria Desert to its ...
, between its westernmost breeding site in
South Australia South Australia (commonly abbreviated as SA) is a state in the southern central part of Australia. It covers some of the most arid parts of the country. With a total land area of , it is the fourth-largest of Australia's states and territories ...
and the nearest breeding sites to the west in
Western Australia Western Australia (commonly abbreviated as WA) is a state of Australia occupying the western percent of the land area of Australia excluding external territories. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to th ...
. In the islands of the
Pacific The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the contine ...
it is found in the
Bismarck Islands The Bismarck Archipelago (, ) is a group of islands off the northeastern coast of New Guinea in the western Pacific Ocean and is part of the Islands Region of Papua New Guinea. Its area is about 50,000 square km. History The first inhabitants o ...
,
Solomon Islands Solomon Islands is an island country consisting of six major islands and over 900 smaller islands in Oceania, to the east of Papua New Guinea and north-west of Vanuatu. It has a land area of , and a population of approx. 700,000. Its capit ...
and New Caledonia, and
fossil A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved ...
remains of adults and juveniles have been found in
Tonga Tonga (, ; ), officially the Kingdom of Tonga ( to, Puleʻanga Fakatuʻi ʻo Tonga), is a Polynesian country and archipelago. The country has 171 islands – of which 45 are inhabited. Its total surface area is about , scattered over in ...
, where it probably was wiped out by arriving humans. It is possible it may once have ranged across
Vanuatu Vanuatu ( or ; ), officially the Republic of Vanuatu (french: link=no, République de Vanuatu; bi, Ripablik blong Vanuatu), is an island country located in the South Pacific Ocean. The archipelago, which is of volcanic origin, is east of no ...
and Fiji as well. It is an uncommon to fairly common winter visitor to all parts of South Asia, and
Southeast Asia Southeast Asia, also spelled South East Asia and South-East Asia, and also known as Southeastern Asia, South-eastern Asia or SEA, is the geographical south-eastern region of Asia, consisting of the regions that are situated south of mainlan ...
from
Myanmar Myanmar, ; UK pronunciations: US pronunciations incl. . Note: Wikipedia's IPA conventions require indicating /r/ even in British English although only some British English speakers pronounce r at the end of syllables. As John Wells explai ...
through to
Indochina Mainland Southeast Asia, also known as the Indochinese Peninsula or Indochina, is the continental portion of Southeast Asia. It lies east of the Indian subcontinent and south of Mainland China and is bordered by the Indian Ocean to the west an ...
and southern China,
Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...
, Malaysia and the Philippines. The worldwide distribution of the species is unusual for land-based birds, and only recognised in five other species.


Behaviour and ecology


Diet

The osprey is
piscivorous A piscivore () is a carnivorous animal that eats primarily fish. The name ''piscivore'' is derived . Piscivore is equivalent to the Greek-derived word ichthyophage, both of which mean "fish eater". Fish were the diet of early tetrapod evoluti ...
, with fish making up 99% of its diet. It typically takes live fish weighing and about in length, but virtually any type of fish from to can be taken. Even larger
northern pike The northern pike (''Esox lucius'') is a species of carnivorous fish of the genus ''Esox'' (the pikes). They are typical of brackish and fresh waters of the Northern Hemisphere (''i.e.'' holarctic in distribution). They are known simply as a p ...
(''Esox lucius'') has been taken in
Russia Russia (, , ), or the Russian Federation, is a transcontinental country spanning Eastern Europe and Northern Asia. It is the largest country in the world, with its internationally recognised territory covering , and encompassing one-eig ...
. Ospreys have vision that is well adapted to detecting underwater objects from the air. Prey is first sighted when the osprey is above the water, after which the bird hovers momentarily and then plunges feet first into the water. They catch fish by diving into a body of water, oftentimes completely submerging their entire bodies. As an osprey dives it adjusts the angle of its flight to account for the distortion of the fish's image caused by
refraction In physics, refraction is the redirection of a wave as it passes from one medium to another. The redirection can be caused by the wave's change in speed or by a change in the medium. Refraction of light is the most commonly observed phenome ...
. Ospreys will typically eat on a nearby perch but have also been known to carry fish for longer distances. Occasionally, the osprey may prey on
rodent Rodents (from Latin , 'to gnaw') are mammals of the order Rodentia (), which are characterized by a single pair of continuously growing incisors in each of the upper and lower jaws. About 40% of all mammal species are rodents. They are n ...
s, rabbits, hares, other mammals,
snake Snakes are elongated, limbless, carnivorous reptiles of the suborder Serpentes . Like all other squamates, snakes are ectothermic, amniote vertebrates covered in overlapping scales. Many species of snakes have skulls with several more j ...
s,
frog A frog is any member of a diverse and largely carnivorous group of short-bodied, tailless amphibians composing the order Anura (ανοὐρά, literally ''without tail'' in Ancient Greek). The oldest fossil "proto-frog" ''Triadobatrachus'' is ...
s,
bird Birds are a group of warm-blooded vertebrates constituting the class Aves (), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweig ...
s,
salamander Salamanders are a group of amphibians typically characterized by their lizard-like appearance, with slender bodies, blunt snouts, short limbs projecting at right angles to the body, and the presence of a tail in both larvae and adults. All t ...
s, conchs and
crustacean Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapods, seed shrimp, branchiopods, fish lice, krill, remipedes, isopods, barnacles, copepods, amphipods and mantis shrimp. The crustacean group can ...
s. Reports of ospreys feeding on carrion are rare. They have been observed eating dead
white-tailed deer The white-tailed deer (''Odocoileus virginianus''), also known as the whitetail or Virginia deer, is a medium-sized deer native to North America, Central America, and South America as far south as Peru and Bolivia. It has also been introduced t ...
and
Virginia opossum The Virginia opossum (''Didelphis virginiana''), also known as the North American opossum, is the only opossum living north of Mexico, its range extending south into Central America. It is the northernmost marsupial in the world. In the United S ...
.


Adaptations

The osprey has several adaptations that suit its piscivorous lifestyle: * reversible outer toes * sharp
spicules Spicules are any of various small needle-like anatomical structures occurring in organisms Spicule may also refer to: *Spicule (sponge), small skeletal elements of sea sponges *Spicule (nematode), reproductive structures found in male nematodes ( ...
on the underside of the toes * closable nostrils to keep out water during dives * backward-facing scales on the talons which act as barbs to help hold its catch * dense plumage which is oily and prevents its feathers from getting waterlogged.


Reproduction

The osprey breeds near freshwater lakes and rivers, and sometimes on coastal brackish waters. Rocky outcrops just offshore are used in
Rottnest Island Rottnest Island ( nys, Wadjemup), often colloquially referred to as "Rotto", is a island off the coast of Western Australia, located west of Fremantle. A sandy, low-lying island formed on a base of aeolianite limestone, Rottnest is an A-class ...
off the coast of
Western Australia Western Australia (commonly abbreviated as WA) is a state of Australia occupying the western percent of the land area of Australia excluding external territories. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to th ...
, where there are 14 or so similar nesting sites of which five to seven are used in any one year. Many are renovated each season, and some have been used for 70 years. The nest is a large heap of sticks, driftwood, turf or seaweed built in forks of trees, rocky outcrops, utility poles, artificial platforms or offshore islets. As wide as 2 meters and weighing about , large nests on utility poles may be
fire hazard Fire safety is the set of practices intended to reduce the destruction caused by fire. Fire safety measures include those that are intended to prevent the ignition of an uncontrolled fire and those that are used to limit the development and ef ...
s and have caused
power outage A power outage (also called a powercut, a power out, a power failure, a power blackout, a power loss, or a blackout) is the loss of the electrical power network supply to an end user. There are many causes of power failures in an electricity ...
s. Generally, ospreys reach sexual maturity and begin breeding around the age of three to four, though in some regions with high osprey densities, such as
Chesapeake Bay The Chesapeake Bay ( ) is the largest estuary in the United States. The Bay is located in the Mid-Atlantic region and is primarily separated from the Atlantic Ocean by the Delmarva Peninsula (including the parts: the Eastern Shore of Maryland / ...
in the United States, they may not start breeding until five to seven years old, and there may be a shortage of suitable tall structures. If there are no nesting sites available, young ospreys may be forced to delay breeding. To ease this problem, posts are sometimes erected to provide more sites suitable for nest building. In some regions ospreys prefer transmission towers as nesting sites, e.g. in eastern Germany. The nesting platform design developed by one organization,
Citizens United to Protect the Maurice River and Its Tributaries, Inc. Citizens United to Protect the Maurice River and Its Tributaries, Inc., or "CU", is a 501(c)(3) (nonprofit) regional watershed organization. It was founded in 1979 and incorporated in 1986. CU received Environmental Quality Awards from the Uni ...
has become the official design of the State of New Jersey, U.S. The nesting platform plans and materials list, available online, have been utilized by people from a number of different geographical regions.Osprey-watch.org
is the global site for mapping osprey nest locations and logging observations on reproductive success. Ospreys usually mate for life. Rarely,
polyandry Polyandry (; ) is a form of polygamy in which a woman takes two or more husbands at the same time. Polyandry is contrasted with polygyny, involving one male and two or more females. If a marriage involves a plural number of "husbands and wives ...
has been recorded. The breeding season varies according to latitude; spring (September–October) in southern Australia, April to July in northern Australia and winter (June–August) in southern Queensland. In spring the pair begins a five-month period of partnership to raise their young. The female lays two to four
eggs Humans and human ancestors have scavenged and eaten animal eggs for millions of years. Humans in Southeast Asia had domesticated chickens and harvested their eggs for food by 1,500 BCE. The most widely consumed eggs are those of fowl, especial ...
within a month, and relies on the size of the nest to conserve heat. The eggs are whitish with bold splotches of reddish-brown and are about and weigh about . The eggs are incubated for about 35–43 days to hatching. The newly hatched chicks weigh only , but fledge in 8–10 weeks. A study on
Kangaroo Island Kangaroo Island, also known as Karta Pintingga (literally 'Island of the Dead' in the language of the Kaurna people), is Australia's third-largest island, after Tasmania and Melville Island. It lies in the state of South Australia, southwest ...
, South Australia, had an average time between hatching and fledging of 69 days. The same study found an average of 0.66 young fledged per year per occupied territory, and 0.92 young fledged per year per active nest. Some 22% of surviving young either remained on the island or returned at maturity to join the breeding population. When food is scarce, the first chicks to hatch are most likely to survive. The typical lifespan is 7–10 years, though rarely individuals can grow to as old as 20–25 years. The oldest European wild osprey on record lived to be over thirty years of age. In North America,
great horned owl The great horned owl (''Bubo virginianus''), also known as the tiger owl (originally derived from early naturalists' description as the "winged tiger" or "tiger of the air"), or the hoot owl, is a large owl native to the Americas. It is an extre ...
s (''Bubo virginianus''),
golden eagle The golden eagle (''Aquila chrysaetos'') is a bird of prey living in the Northern Hemisphere. It is the most widely distributed species of eagle. Like all eagles, it belongs to the family Accipitridae. They are one of the best-known birds of ...
s (''Aquila chrysaetos''), and bald eagles (''Haliaeetus leucocephalus'') are the only major predators of ospreys, capable of taking both nestlings and adults. However,
kleptoparasitism Kleptoparasitism (etymologically, parasitism by theft) is a form of feeding in which one animal deliberately takes food from another. The strategy is evolutionarily stable when stealing is less costly than direct feeding, which can mean when f ...
by bald eagles, where the larger raptor steals the osprey's catch, is more common than predation. The
white-tailed eagle The white-tailed eagle (''Haliaeetus albicilla'') is a very large species of sea eagle widely distributed across temperate Eurasia. Like all eagles, it is a member of the family Accipitridae (or accipitrids) which includes other diurnal raptors ...
(''Haliaeetus albicilla''), which is very similar to the bald eagle, may harass or prey on the osprey in Eurasia.
Raccoon The raccoon ( or , ''Procyon lotor''), sometimes called the common raccoon to distinguish it from other species, is a mammal native to North America. It is the largest of the procyonid family, having a body length of , and a body weight of ...
s (''Procyon lotor'') can be a serious threat to nestlings or eggs if they can access the nest. Endoparasitic
trematode Trematoda is a class of flatworms known as flukes. They are obligate internal parasites with a complex life cycle requiring at least two hosts. The intermediate host, in which asexual reproduction occurs, is usually a snail. The definitive h ...
s (''Scaphanocephalus expansus'' and ''Neodiplostomum'' spp.) have been recorded in wild ospreys.


Migration

European breeders winter in Africa. American and Canadian breeders winter in South America, although some stay in the southernmost U.S. states such as
Florida Florida is a state located in the Southeastern region of the United States. Florida is bordered to the west by the Gulf of Mexico, to the northwest by Alabama, to the north by Georgia, to the east by the Bahamas and Atlantic Ocean, and to ...
and
California California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the m ...
. Some ospreys from Florida migrate to South America.
Australasia Australasia is a region that comprises Australia, New Zealand and some neighbouring islands in the Pacific Ocean. The term is used in a number of different contexts, including geopolitically, physiogeographically, philologically, and ecologi ...
n ospreys tend not to migrate. Studies of Swedish ospreys showed that females tend to migrate to Africa earlier than males. More stopovers are made during their autumn migration. The variation of timing and duration in autumn was more variable than in spring. Although migrating predominantly during the day, they sometimes fly in the dark hours particularly in crossings over water and cover on average per day with a maximum of per day. European birds may also winter in South Asia, as indicated by an osprey tagged in Norway being monitored in western India. In the Mediterranean, ospreys show partial migratory behaviour with some individuals remaining resident, whilst others undertake relatively short migration trips.


Mortality

Swedish ospreys have a significantly higher mortality rate during migration seasons than during stationary periods, with more than half of the total annual mortality occurring during migration. These deaths can also be categorized into spatial patterns: Spring mortality occurs mainly in Africa, which can be traced to crossing the
Sahara desert , photo = Sahara real color.jpg , photo_caption = The Sahara taken by Apollo 17 astronauts, 1972 , map = , map_image = , location = , country = , country1 = , ...
. Mortality can also occur through mishaps with human utilities, such as nesting near overhead electric cables or collisions with aircraft.


Conservation

The osprey has a large range, covering in just Africa and the Americas, and has a large global population estimated at 460,000 individuals. Although global population trends have not been quantified, the species is not believed to approach the thresholds for the population decline criterion of the IUCN Red List (i.e., declining more than 30% in ten years or three generations), and for these reasons, the species is evaluated as Least Concern. There is evidence for regional decline in South Australia where former territories at locations in the Spencer Gulf and along the lower
Murray River The Murray River (in South Australia: River Murray) (Ngarrindjeri: ''Millewa'', Yorta Yorta: ''Tongala'') is a river in Southeastern Australia. It is Australia's longest river at extent. Its tributaries include five of the next six longest ...
have been vacant for decades. In the late 19th and early 20th centuries, the main threats to osprey populations were egg collectors and hunting of the adults along with other birds of prey, but osprey populations declined drastically in many areas in the 1950s and 1960s; this appeared to be in part due to the toxic effects of insecticides such as
DDT Dichlorodiphenyltrichloroethane, commonly known as DDT, is a colorless, tasteless, and almost odorless crystalline chemical compound, an organochloride. Originally developed as an insecticide, it became infamous for its environmental impacts. ...
on reproduction. The pesticide interfered with the bird's
calcium Calcium is a chemical element with the symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air. Its physical and chemical properties are most similar t ...
metabolism which resulted in thin-shelled, easily broken or infertile eggs. Possibly because of the banning of DDT in many countries in the early 1970s, together with reduced persecution, the osprey, as well as other affected
bird of prey Birds of prey or predatory birds, also known as raptors, are hypercarnivorous bird species that actively hunt and feed on other vertebrates (mainly mammals, reptiles and other smaller birds). In addition to speed and strength, these predat ...
species, have made significant recoveries. In South Australia, nesting sites on the
Eyre Peninsula The Eyre Peninsula is a triangular peninsula in South Australia. It is bounded by the Spencer Gulf on the east, the Great Australian Bight on the west, and the Gawler Ranges to the north. Originally called Eyre’s Peninsula, it was named af ...
and
Kangaroo Island Kangaroo Island, also known as Karta Pintingga (literally 'Island of the Dead' in the language of the Kaurna people), is Australia's third-largest island, after Tasmania and Melville Island. It lies in the state of South Australia, southwest ...
are vulnerable to unmanaged coastal recreation and encroaching urban development.


Cultural depictions


Literature

* The Roman writer
Pliny the Elder Gaius Plinius Secundus (AD 23/2479), called Pliny the Elder (), was a Roman author, naturalist and natural philosopher, and naval and army commander of the early Roman Empire, and a friend of the emperor Vespasian. He wrote the encyclopedic ' ...
reported that parent ospreys made their young fly up to the sun as a test, and dispatched any that failed. * Another odd legend regarding this fish-eating bird of prey, derived from the writings of
Albertus Magnus Albertus Magnus (c. 1200 – 15 November 1280), also known as Saint Albert the Great or Albert of Cologne, was a German Dominican friar, philosopher, scientist, and bishop. Later canonised as a Catholic saint, he was known during his li ...
and recorded in Holinshed's ''Chronicles'', was that it had one webbed foot and one taloned foot. * The osprey is mentioned in the famous Chinese folk poem "guan guan ju jiu" (關關雎鳩); "ju jiu" 雎鳩 refers to the osprey, and "guan guan" (關關) to its voice. In the poem, the osprey is considered to be an icon of fidelity and harmony between wife and husband, due to its highly monogamous habits. Some commentators have claimed that "ju jiu" in the poem is not the osprey but the
mallard duck The mallard () or wild duck (''Anas platyrhynchos'') is a dabbling duck that breeds throughout the temperate and subtropical Americas, Eurasia, and North Africa, and has been introduced species, introduced to New Zealand, Australia, Peru, Bra ...
, since the osprey cannot make the sound "guan guan". * The Irish poet
William Butler Yeats William Butler Yeats (13 June 186528 January 1939) was an Irish poet, dramatist, writer and one of the foremost figures of 20th-century literature. He was a driving force behind the Irish Literary Revival and became a pillar of the Irish liter ...
used a grey wandering osprey as a representation of sorrow in ''The Wanderings of Oisin and Other Poems'' (1889). * There was a medieval belief that fish were so mesmerised by the osprey that they turned belly-up in surrender, and this is referenced by
Shakespeare William Shakespeare ( 26 April 1564 – 23 April 1616) was an English playwright, poet and actor. He is widely regarded as the greatest writer in the English language and the world's pre-eminent dramatist. He is often called England's natio ...
in Act 4 Scene 5 of ''
Coriolanus ''Coriolanus'' ( or ) is a tragedy by William Shakespeare, believed to have been written between 1605 and 1608. The play is based on the life of the legendary Roman leader Caius Marcius Coriolanus. Shakespeare worked on it during the same yea ...
'':
I think he'll be to Rome
As is the osprey to the fish, who takes it
By sovereignty of nature.


Religion

In Buddhism, the osprey is sometimes represented as the "King of Birds", especially in '' 'The Jātaka: Or, Stories of the Buddha’s Former Births' '', no. 486.


Iconography

* In heraldry, the osprey is typically depicted as a white eagle, often maintaining a fish in its talons or beak, and termed a "sea-eagle". It is historically regarded as a symbol of vision and abundance; more recently it has become a symbol of positive responses to nature, and has been featured on more than 50 international
postage stamp A postage stamp is a small piece of paper issued by a post office, postal administration, or other authorized vendors to customers who pay postage (the cost involved in moving, insuring, or registering mail), who then affix the stamp to the f ...
s. * In 1994, the osprey was declared the provincial bird of
Nova Scotia Nova Scotia ( ; ; ) is one of the thirteen provinces and territories of Canada. It is one of the three Maritime provinces and one of the four Atlantic provinces. Nova Scotia is Latin for "New Scotland". Most of the population are native Eng ...
, Canada. * It is also the official bird of
Södermanland Södermanland ( or ), locally Sörmland, sometimes referred to under its Latin form ''Sudermannia'' or ''Sudermania'', is a historical province or ''landskap'' on the south eastern coast of Sweden. It borders Östergötland, Närke, Västman ...
, Sweden. * The cap badge of Rhodesia's
Selous Scouts The Selous Scouts was a special forces unit of the Rhodesian Army that operated during the Rhodesian Bush War from 1973 until the reconstitution of the country as Zimbabwe in 1980. It was mainly responsible for infiltrating the black majority ...
(1973-1980) was a stylized osprey. * Ospreys are a common feature of
First nations First Nations or first peoples may refer to: * Indigenous peoples, for ethnic groups who are the earliest known inhabitants of an area. Indigenous groups *First Nations is commonly used to describe some Indigenous groups including: **First Natio ...
artwork in the
Pacific Northwest The Pacific Northwest (sometimes Cascadia, or simply abbreviated as PNW) is a geographic region in western North America bounded by its coastal waters of the Pacific Ocean to the west and, loosely, by the Rocky Mountains to the east. Tho ...
, such as Kwakwakaʼwakw art. They are often used to depict the mythical
thunderbird Thunderbird, thunder bird or thunderbirds may refer to: * Thunderbird (mythology), a legendary creature in certain North American indigenous peoples' history and culture * Ford Thunderbird, a car Birds * Dromornithidae, extinct flightless birds ...
.


Sports

The osprey is used as a brand name for various products and sports teams, such as the Ospreys (a
Welsh Welsh may refer to: Related to Wales * Welsh, referring or related to Wales * Welsh language, a Brittonic Celtic language spoken in Wales * Welsh people People * Welsh (surname) * Sometimes used as a synonym for the ancient Britons (Celtic peop ...
Rugby Rugby may refer to: Sport * Rugby football in many forms: ** Rugby league: 13 players per side *** Masters Rugby League *** Mod league *** Rugby league nines *** Rugby league sevens *** Touch (sport) *** Wheelchair rugby league ** Rugby union: 1 ...
team) and Seattle Seahawks (an
American football American football (referred to simply as football in the United States and Canada), also known as gridiron, is a team sport played by two teams of eleven players on a rectangular field with goalposts at each end. The offense, the team wi ...
team of the
National Football League The National Football League (NFL) is a professional American football league that consists of 32 teams, divided equally between the American Football Conference (AFC) and the National Football Conference (NFC). The NFL is one of the ...
). The official mascot of athletic teams at the
University of North Carolina Wilmington The University of North Carolina Wilmington (UNCW or UNC Wilmington) is a public research university in Wilmington, North Carolina. It is part of the University of North Carolina System and enrolls 17,499 undergraduate and graduate students eac ...
is named Sammy C. Hawk. The Riverhawk is the mascot for
Northeastern State University Northeastern State University (NSU) is a public university with its main campus in Tahlequah, Oklahoma. The university also has two other campuses in Muskogee and Broken Arrow as well as online. Northeastern is the oldest institution of high ...
in Tahlequah, Oklahoma as well as the University of Massachussets-Lowell. The Osprey is the mascot of the
University of North Florida The University of North Florida (UNF) is a public research university in Jacksonville, Florida. It is part of the State University System of Florida and is accredited by the Commission on Colleges of the Southern Association of Colleges and Sc ...
in
Jacksonville Jacksonville is a city located on the Atlantic coast of northeast Florida, the most populous city proper in the state and is the List of United States cities by area, largest city by area in the contiguous United States as of 2020. It is the co ...
, Florida.


Other

So-called "osprey" plumes were an important item in the
plume trade Plume hunting is the hunting of wild birds to harvest their feathers, especially the more decorative plumes which were sold for use as ornamentation, such as aigrettes in millinery. The movement against the plume trade in the United Kingdom wa ...
of the late 19th century and used in hats including those used as part of the army uniform. Despite their name, these plumes were actually obtained from
egret Egrets ( ) are herons, generally long-legged wading birds, that have white or buff plumage, developing fine plumes (usually milky white) during the breeding season. Egrets are not a biologically distinct group from herons and have the same build ...
s. During the 2017 regular session of the
Oregon Legislature The Oregon Legislative Assembly is the state legislature for the U.S. state of Oregon. The Legislative Assembly is bicameral, consisting of an upper and lower house: the Senate, whose 30 members are elected to serve four-year terms; and the ...
, there was a short-lived controversy over the
western meadowlark The western meadowlark (''Sturnella neglecta'') is a medium-sized icterid bird, about in length. It nests on the ground in open grasslands across western and central North America. It feeds mostly on bugs, but will also feed on seeds and berri ...
's status as state bird versus the osprey. The sometimes-spirited debate included state representative
Rich Vial Armand Richard Vial (born September 28, 1954) is an American lawyer, farmer, small business owner, and Nonpartisan candidate for Oregon's State Senate District 18, which covers parts of Washington County, in the November 2022 midterm election. ...
playing the meadowlark's song on his smartphone over the House microphone. A compromise was reached in SCR 18, which was passed on the last day of the session, designating the western meadowlark as the state
songbird A songbird is a bird belonging to the suborder Passeri of the perching birds (Passeriformes). Another name that is sometimes seen as the scientific or vernacular name is Oscines, from Latin ''oscen'', "songbird". The Passeriformes contains 5000 ...
and the osprey as the state
raptor Raptor or RAPTOR may refer to: Animals The word "raptor" refers to several groups of bird-like dinosaurs which primarily capture and subdue/kill prey with their talons. * Raptor (bird) or bird of prey, a bird that primarily hunts and feeds on ...
.


References


Notes


External links

* * * *
UK Osprey Information
Royal Society for the Protection of Birds *
Osprey species text in ''The Atlas of Southern African Birds''


– USGS Patuxent Bird Identification InfoCenter

Animal Diversity Web


Osprey Nest Monitoring Program at OspreyWatch

''Ospreys Rebound, Rely On Help From Humans''
Documentary produced by
Oregon Field Guide ''Oregon Field Guide'' is a weekly television program produced by Oregon Public Broadcasting focusing on recreation, the outdoors, and environmental issues in the state of Oregon. The show has become part of the Oregon zeitgeist. Steve Amen is th ...

Hellgate Ospreys Bird Cam
Montana Osprey Project, hosted by the Cornell Lab {{Authority control Pandion (bird) Falconiformes (sensu lato) Cosmopolitan birds Birds of the Dominican Republic Extant Miocene first appearances Symbols of Oregon Provincial symbols of Nova Scotia Taxa named by Carl Linnaeus Birds described in 1758