The black-capped petrel (''Pterodroma hasitata''), also known as the diablotín, is a small

seabird Seabirds (also known as marine birds) are birds that are adapted to life within the marine environment. While seabirds vary greatly in lifestyle, behaviour and physiology, they often exhibit striking convergent evolution, as the same enviro ...

native to the

West Indies The West Indies is a subregion of North America, surrounded by the North Atlantic Ocean and the Caribbean Sea that includes 13 independent island countries and 18 dependencies and other territories in three major archipelagos: the Greater A ...

in the genus '' Pterodroma''. It is a long-winged petrel with a grey-brown back and wings, with a white

nape The nape is the back of the neck. In technical anatomical/medical terminology, the nape is also called the nucha (from the Medieval Latin rendering of the Arabic , "spinal marrow"). The corresponding adjective is ''nuchal'', as in the term ''nu ...

and rump. Underparts are mainly white apart from a black cap (that in some individuals extends to cover the

eye Eyes are organs of the visual system. They provide living organisms with vision, the ability to receive and process visual detail, as well as enabling several photo response functions that are independent of vision. Eyes detect light and conv ...

) and some dark underwing markings. It picks food items such as

squid True squid are molluscs with an elongated soft body, large eyes, eight arms, and two tentacles in the superorder Decapodiformes, though many other molluscs within the broader Neocoleoidea are also called squid despite not strictly fitting t ...

from the

ocean The ocean (also the sea or the world ocean) is the body of salt water that covers approximately 70.8% of the surface of Earth and contains 97% of Earth's water. An ocean can also refer to any of the large bodies of water into which the wo ...

surface.

Description

The black-capped petrel is large compared to other gadfly petrels, with a length of about 16 inches (40.5 cm) and 37 inches (94 cm) wingspan. The most similar species within its range is the

Bermuda petrel The Bermuda petrel (''Pterodroma cahow'') is a gadfly petrel. Commonly known in Bermuda as the cahow, a name derived from its eerie cries, this nocturnal ground-nesting seabird is the national bird of Bermuda and can be found pictured on Bermudi ...

, which is smaller and has a narrower white rump patch and an extensive gray cowl. The

great shearwater The great shearwater (''Ardenna gravis'') is a large shearwater in the seabird family Procellariidae. It breeds colonially on rocky islands in the south Atlantic. Outside the breeding season it ranges widely in the Atlantic. Taxonomy The great s ...

is also superficially similar. The critically endangered or possibly

extinct Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and ...

Jamaica petrel (''P. caribbaea'') was a related dark form. The local

Spanish Spanish might refer to: * Items from or related to Spain: **Spaniards are a nation and ethnic group indigenous to Spain **Spanish language, spoken in Spain and many Latin American countries **Spanish cuisine Other places * Spanish, Ontario, Cana ...

name, ''Diablotín'', means "little devil" because of its night-time habits and odd-sounding mating calls, which suggested to locals the presence of evil spirits in the dark. The petrel will occasionally utter other croaks and sounds while foraging at sea. The black-capped petrel is

nocturnal Nocturnality is an animal behavior characterized by being active during the night and sleeping during the day. The common adjective is "nocturnal", versus diurnal meaning the opposite. Nocturnal creatures generally have highly developed sens ...

on its breeding grounds, possibly to avoid predation by

gull Gulls, or colloquially seagulls, are seabirds of the family Laridae in the suborder Lari. They are most closely related to the terns and skimmers and only distantly related to auks, and even more distantly to waders. Until the 21st century, m ...

s, hawks or crows. Like most

petrels Petrels are tube-nosed seabirds in the bird order Procellariiformes. Description The common name does not indicate relationship beyond that point, as "petrels" occur in three of the four families within that group (all except the albatross f ...

, its walking ability is limited to a short shuffle to the nest

burrow An Eastern chipmunk at the entrance of its burrow A burrow is a hole or tunnel excavated into the ground by an animal to construct a space suitable for habitation or temporary refuge, or as a byproduct of locomotion. Burrows provide a form of sh ...

Taxonomy

There are two variants of the black-capped petrel; a dark or black-faced form, and a light or white-faced form. Genetic evidence of divergence suggests that these two color morphs represent distinct breeding populations. However, it is unclear whether these populations represent separate species or subspecies. Intermediate birds showing features of both populations are known to exist.

Distribution and habitat

Range

Although this

once bred on steep mountainsides of the

Greater Antilles The Greater Antilles ( es, Grandes Antillas or Antillas Mayores; french: Grandes Antilles; ht, Gwo Zantiy; jam, Grieta hAntiliiz) is a grouping of the larger islands in the Caribbean Sea, including Cuba, Hispaniola, Puerto Rico, Jamaica, and ...

, only three confirmed breeding areas remain in the high mountains of

Hispaniola Hispaniola (, also ; es, La Española; Latin and french: Hispaniola; ht, Ispayola; tnq, Ayiti or Quisqueya) is an island in the Caribbean that is part of the Greater Antilles. Hispaniola is the most populous island in the West Indies, and th ...

(in Sierra de Bahoruco and

Valle Nuevo National Park :::''This list is for national parks in the Dominican Republic. For national parks in the similarly named country of Dominica, see List of national parks of Dominica.'' List of the National parks of the Dominican Republic, located on and near ...

in the

Dominican Republic The Dominican Republic ( ; es, República Dominicana, ) is a country located on the island of Hispaniola in the Greater Antilles archipelago of the Caribbean region. It occupies the eastern five-eighths of the island, which it shares wit ...

, and

Massif de la Selle In geology, a massif ( or ) is a section of a planet's crust that is demarcated by faults or flexures. In the movement of the crust, a massif tends to retain its internal structure while being displaced as a whole. The term also refers to a ...

and

Massif de la Hotte The Massif de la Hotte is a mountain range in southwestern Haiti, on the Tiburon Peninsula. About 2.5 million years ago, Massif de la Hotte was separated from the Massif de la Selle by a deep, wide sea channel, and formed a separate island. This r ...

Haiti Haiti (; ht, Ayiti ; French: ), officially the Republic of Haiti (); ) and formerly known as Hayti, is a country located on the island of Hispaniola in the Greater Antilles archipelago of the Caribbean Sea, east of Cuba and Jamaica, and ...

). In 2015, birds were also confirmed nesting on a second island (

Dominica Dominica ( or ; Kalinago: ; french: Dominique; Dominican Creole French: ), officially the Commonwealth of Dominica, is an island country in the Caribbean. The capital, Roseau, is located on the western side of the island. It is geographically ...

), which had long been suspected given historical nesting there. A mountain peak where it formerly bred in Haiti (and another in Dominica) is still named "Mont Diablotin" in reference to the "little devil" moniker. The warm waters of the

Gulf Stream The Gulf Stream, together with its northern extension the North Atlantic Current, North Atlantic Drift, is a warm and swift Atlantic Ocean, Atlantic ocean current that originates in the Gulf of Mexico and flows through the Straits of Florida a ...

serve as the primary foraging area for this species. Most birds during the non-breeding season are concentrated off the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...

coast between

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

North Carolina North Carolina () is a state in the Southeastern region of the United States. The state is the 28th largest and 9th-most populous of the United States. It is bordered by Virginia to the north, the Atlantic Ocean to the east, Georgia and So ...

, though they have been known to wander far to the north and east toward

Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a Continent#Subcontinents, subcontinent of Eurasia ...

. The species has been seen year-round in the Gulf Stream. The birds that visit these waters during the breeding season either represent non-breeders or are making long foraging trips away from the nest. The black-capped petrel is almost strictly

pelagic The pelagic zone consists of the water column of the open ocean, and can be further divided into regions by depth (as illustrated on the right). The word ''pelagic'' is derived . The pelagic zone can be thought of as an imaginary cylinder or wa ...

away from the breeding grounds and is known to join loose flocks with other seabirds such as

shearwaters Shearwaters are medium-sized long-winged seabirds in the petrel family Procellariidae. They have a global marine distribution, but are most common in temperate and cold waters, and are pelagic outside the breeding season. Description These tub ...

and

terns Terns are seabirds in the family Laridae that have a worldwide distribution and are normally found near the sea, rivers, or wetlands. Terns are treated as a subgroup of the family Laridae which includes gulls and skimmers and consists of e ...

Nesting

Like other gadfly petrels, the black-capped petrel nests in burrows in remote

highland Highlands or uplands are areas of high elevation such as a mountainous region, elevated mountainous plateau or high hills. Generally speaking, upland (or uplands) refers to ranges of hills, typically from up to while highland (or highlands) is ...

areas of islands. These burrows are typically located on forested cliffs, and are very difficult to locate. They visit burrows at night, so as to avoid detection by predators.

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 ...

are typically laid in January, which will subsequently hatch sometime in March. Fledglings will then depart the nest in either June or July.

Conservation

The species, once abundant in the

Caribbean The Caribbean (, ) ( es, El Caribe; french: la Caraïbe; ht, Karayib; nl, De Caraïben) is a region of the Americas that consists of the Caribbean Sea, its islands (some surrounded by the Caribbean Sea and some bordering both the Caribbean Se ...

, has declined significantly and is now one of the most

endangered An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and inva ...

seabirds in the

North Atlantic The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the "Old World" of Africa, Europe and ...

along with the Bermuda petrel. In the early 20th century, there was speculation that the black-capped petrel was

, but more current population estimates range from 2,000-4,000 individuals. Most of the threats facing the black-capped petrel are on its nesting grounds, where causes for its demise include habitat loss, introduced predators, and direct harvesting by humans. Human predation appears to have become more limited in scope than in historic times, due in part to the species' current scarcity. Deforestation from wildfires and direct human use have likely decreased the amount of suitable nesting habitat available to the black-capped petrel. This is especially true in

, which has suffered severe loss of

forest cover Forest cover is the amount of forest that covers a particular area of land. It may be measured as relative (in percent) or absolute (in square kilometres/square miles). Around a third of the world's surface is covered with forest, with closed-canop ...

in recent years. Current

conservation Conservation is the preservation or efficient use of resources, or the conservation of various quantities under physical laws. Conservation may also refer to: Environment and natural resources * Nature conservation, the protection and managem ...

plans for the petrel largely involve preserving forest cover around known nesting areas as well as monitoring and searching for burrows. There are also concerns that

hydrocarbon exploration Hydrocarbon exploration (or oil and gas exploration) is the search by petroleum geologists and geophysicists for deposits of hydrocarbons, particularly petroleum and natural gas, in the Earth using petroleum geology. Exploration methods Vis ...

off of the Southeast United States could negatively affect the species' continued survival. In 2018, the US Fish and Wildlife Service proposed listing the black-capped petrel as threatened.

References

Bibliography

* Dod, Annabelle Stockton (1978). ''Aves de la República Dominicana''. Museo Nacional de Historia Natural, Santo Domingo, Dominican Republic. * Dod, A. S. (1992). ''Endangered and Endemic Birds of the Dominican Republic''. Cypress House * Latta, Steven; et al. (2006). ''Aves de la República Dominicana y Haití''. Princeton University Press. * Howell, Steve N. G. (2012). ''Petrels, Albatrosses & Storm-Petrels of North America''. Princeton University Press. p. 168-171. .

External links

BTO BirdFacts - black-capped petrel

* ttp://dominicanewsonline.com/news/homepage/news/environment/rare-caribbean-bird-rediscovered-in-dominica/ Rare Caribbean bird rediscovered in Dominica {{Taxonbar, from=Q1264430

black-capped petrel The black-capped petrel (''Pterodroma hasitata''), also known as the diablotín, is a small seabird native to the West Indies in the genus '' Pterodroma''. It is a long-winged petrel with a grey-brown back and wings, with a white nape and rump. ...

Birds of the Dominican Republic Birds of Haiti Birds of Dominica Endemic birds of the Caribbean