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Letter-winged Kite
The letter-winged kite (''Elanus scriptus'') is a small, rare and Irruptive growth, irruptive bird of prey that is endemism, found only in Australia. Measuring around in length with a wingspan of , the adult letter-winged kite has predominantly pale grey and white plumage and prominent black rings around its red eyes. It gains its name from the highly distinctive black underwing pattern of a shallow 'M' or 'W' shape, seen when in flight. This distinguishes it from the otherwise similar black-shouldered kite. This species is also the only nocturnal species within the order Accipitriformes despite few differences found in its visual anatomy to other closely related kites. The species begins breeding in response to rodent outbreaks, with pairs nesting in loose colonies of up to 50 birds each. Three to four eggs are laid and incubated for around thirty days, though the eggs may be abandoned if the food source disappears. Chicks are fledged within five weeks of hatching. Roosti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Gould
John Gould (; 14 September 1804 – 3 February 1881) was an English ornithologist. He published a number of monographs on birds, illustrated by plates produced by his wife, Elizabeth Gould, and several other artists, including Edward Lear, Henry Constantine Richter, Joseph Wolf and William Matthew Hart. He has been considered the father of bird study in Australia and the Gould League in Australia is named after him. His identification of the birds now nicknamed "Darwin's finches" played a role in the inception of Darwin's theory of evolution by natural selection. Gould's work is referenced in Charles Darwin's book, ''On the Origin of Species''. Early life Gould was born in Lyme Regis, the first son of a gardener. Both father and son probably had little education. After working on Dowager Lady Poulett's glass house, his father obtained a position on an estate near Guildford, Surrey, and then in 1818, Gould Snr became foreman in the Royal Gardens of Windsor. Gould then be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Ornithologists' Union
The International Ornithologists' Union, formerly known as the International Ornithological Committee, is a group of about 200 international ornithologists, and is responsible for the International Ornithological Congress and other international ornithological activities, undertaken by its standing committees. International Ornithological Congress The International Ornithological Congress series forms the oldest and largest international series of meetings of ornithologists. It is organised by the International Ornithologists' Union. The first meeting was in 1884; subsequent meetings were irregular until 1926 since when meetings have been held every four years, except for two missed meetings during and in the immediate aftermath of the Second World War. Meetings See also * '' Birds of the World: Recommended English Names'', a book written by Frank Gill Frank Gill may refer to: * Frank Gill (Australian footballer) (1908–1970), Australian rules footballer with Carlton * Fran ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Contact Call
Contact calls are seemingly haphazard sounds made by many social animals (such as a chicken's cluck). Contact calls are unlike other calls (such as alarm calls) in that they are not usually widely used, conspicuous calls, but rather short exclamations that differ between individuals. Often, the message that the call is meant to convey is specific to the individual or group's activity, such as informing other members of the group about one's location while foraging for food. Some social animal species communicate the signal of potential danger by stopping contact calls, without the use of alarm calls. Charles Darwin wrote about this in relation to wild horse and cattle. Humming as contact calls Joseph Jordania suggested that human humming could have played a function of contact calls in early human ancestors. According to his suggestion, humans find it distressing to be in full silence (which is a sign of danger for them), and this is why humans who are alone sometimes hum, whistle, t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grey Falcon
The grey falcon (''Falco hypoleucos'') is a medium-sized falcon native to Australia, possibly the rarest. It is uncommon throughout its range and is currently classified as Vulnerable. Taxonomy The description of the species was published by John Gould, based on a specimen obtained from Lockier Burges, a pastoralist at York, Western Australia, who provided it to the collector John Gilbert. Gould's description was issued in the fifth volume (1841) of ''Birds of Australia'', and was accompanied by a lithograph produced by Elizabeth Gould, rendered shortly before her early death. The specimen obtained from Burges, mentioned in Gilbert's report of September 1839, was later revealed to be an immature bird when another specimen was shot by Gilbert in 1842. This bird, found 60 kilometres north of Moore River, was larger and paler than the first Gilbert had supplied, and although he thought it may be an older bird he hopefully noted it as a possible new species. The explorer Charles ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eastern Grass Owl
The eastern grass owl (''Tyto longimembris''), also known as Chinese grass owl or Australian grass owl, is a species of owl in the family Tytonidae. They feed predominantly on small rodents. Though some authorities consider this owl to be conspecific with the African grass owl, ''T. capensis'', other consider it to be a valid species. Description The eastern grass owl is a medium-sized owl, similar in size to the barn owl. Adult males measure from in length, while the larger females can measure from . The wingspan is from . The female weighs while the male weighs . They have dark brown or tan upper parts with pale spots. They have black and tan bars on its wings and a very pale beak, feathered legs, and dark brown eyes. Like all ''Tyto'' owls, it has a heart-shaped facial disk with brown buff and a white bordering. Call The eastern grass owl's primary call is like many other tyto owls. A loud, hissing screech but the grass owl's screech is louder than a barn owl's but quieter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eastern Barn Owl
The eastern barn owl (''Tyto javanica'') is usually considered a subspecies group and together with the American barn owl group, the western barn owl group, and sometimes the Andaman masked owl make up the barn owl. The cosmopolitan barn owl is recognized by most taxonomic authorities. A few (including the International Ornithologists' Union) separate them into distinct species, as is done here. The eastern barn owl is native to southeastern Asia and Australasia. The eastern barn owl is nocturnal over most of its range, but in some Pacific islands, it also hunts by day. They specialise in hunting animals on the ground, and nearly all of their food consists of small mammals which they locate by sound, their hearing being very acute. They mate for life unless one of the pair is killed, after which a new pair bond may be formed. Breeding takes place at varying times of year according to locality, with a clutch, averaging about four eggs, being laid in a nest in a tree hollow, old b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moulting
In biology, moulting (British English), or molting (American English), also known as sloughing, shedding, or in many invertebrates, ecdysis, is the manner in which an animal routinely casts off a part of its body (often, but not always, an outer layer or covering), either at specific times of the year, or at specific points in its life cycle. In medieval times it was also known as "mewing" (from the French verb "muer", to moult), a term that lives on in the name of Britain's Royal Mews where the King's hawks used to be kept during moulting time before becoming horse stables after Tudor times. Moulting can involve shedding the Epidermis (skin), epidermis (skin), pelage (hair, feathers, fur, wool), or other external layer. In some groups, other body parts may be shed, for example, the entire exoskeleton in arthropods, including the wings in some insects. Examples In birds In birds, moulting is the periodic replacement of feathers by shedding old feathers while producing new o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flight Feather
Flight feathers (''Pennae volatus'') are the long, stiff, asymmetrically shaped, but symmetrically paired pennaceous feathers on the wings or tail of a bird; those on the wings are called remiges (), singular remex (), while those on the tail are called rectrices (), singular rectrix (). The primary function of the flight feathers is to aid in the generation of both thrust and lift (force), lift, thereby enabling bird flight, flight. The flight feathers of some birds have evolved to perform additional functions, generally associated with territorial displays, courtship rituals or feeding methods. In some species, these feathers have developed into long showy plumes used in visual courtship displays, while in others they create a sound during display flights. Tiny serrations on the leading edge of their remiges help owls to fly silently (and therefore hunt more successfully), while the extra-stiff rectrices of woodpeckers help them to brace against tree trunks as they hammer on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Covert Feather
A covert feather or tectrix on a bird is one of a set of feathers, called coverts (or ''tectrices''), which, as the name implies, cover other feathers. The coverts help to smooth airflow over the wings and tail. Ear coverts The ear coverts are small feathers behind the bird's eye which cover the ear opening (the ear of a bird has no external features) Tail coverts The uppertail and undertail coverts cover the base of the tail feathers above and below. Sometimes these coverts are more specialised. The "tail" of a peacock is made of very elongated uppertail coverts. Wing coverts The upperwing coverts fall into two groups: those on the inner wing, which overlay the secondary flight feathers, known as the secondary coverts, and those on the outerwing, which overlay the primary flight feathers, the primary coverts. Within each group, the feathers form a number of rows. The feathers of the outermost, largest, row are termed greater (primary-/secondary-) coverts; those in the next row ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beak
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, courtship, and feeding young. The terms ''beak'' and ''rostrum'' are also used to refer to a similar mouth part in some ornithischians, pterosaurs, cetaceans, dicynodonts, anuran tadpoles, monotremes (i.e. echidnas and platypuses, which have a beak-like structure), sirens, pufferfish, billfishes and cephalopods. Although beaks vary significantly in size, shape, color and texture, they share a similar underlying structure. Two bony projections – the upper and lower mandibles – are covered with a thin keratinized layer of epidermis known as the rhamphotheca. In most species, two holes called ''nares'' lead to the respiratory system. Etymology Although the word "beak" was, in the past, generally restricted to the sharpened bills o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Letter-winged Kite (Elanus Scriptus)3
The letter-winged kite (''Elanus scriptus'') is a small, rare and irruptive bird of prey that is found only in Australia. Measuring around in length with a wingspan of , the adult letter-winged kite has predominantly pale grey and white plumage and prominent black rings around its red eyes. It gains its name from the highly distinctive black underwing pattern of a shallow 'M' or 'W' shape, seen when in flight. This distinguishes it from the otherwise similar black-shouldered kite. This species is also the only nocturnal species within the order Accipitriformes despite few differences found in its visual anatomy to other closely related kites. The species begins breeding in response to rodent outbreaks, with pairs nesting in loose colonies of up to 50 birds each. Three to four eggs are laid and incubated for around thirty days, though the eggs may be abandoned if the food source disappears. Chicks are fledged within five weeks of hatching. Roosting in well-foliaged trees ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sparrowhawk
Sparrowhawk (sometimes sparrow hawk) may refer to several species of small hawk in the genus ''Accipiter''. "Sparrow-hawk" or sparhawk originally referred to ''Eurasian sparrowhawk, Accipiter nisus'', now called "Eurasian" or "northern" sparrowhawk to distinguish it from other species. The American kestrel (''Falco sparverius''), a North American falcon species, is also commonly referred to as a "sparrow hawk". Hawk species include: {{Animal common name Accipiter Birds by common name ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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