The plume-toed swiftlet (''Collocalia affinis'') is a small bird in the

swift Swift or SWIFT most commonly refers to: * SWIFT, an international organization facilitating transactions between banks ** SWIFT code * Swift (programming language) * Swift (bird), a family of birds It may also refer to: Organizations * SWIF ...

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Apodidae The Apodidae, or swifts, form a family of highly aerial birds. They are superficially similar to swallows, but are not closely related to any passerine species. Swifts are placed in the order Apodiformes along with hummingbirds. The treeswifts ar ...

. It is found on some eastern

Indian Ocean The Indian Ocean is the third-largest of the world's five oceanic divisions, covering or approximately 20% of the water area of Earth#Surface, Earth's surface. It is bounded by Asia to the north, Africa to the west and Australia (continent), ...

islands, the

Malay Peninsula The Malay Peninsula is located in Mainland Southeast Asia. The landmass runs approximately north–south, and at its terminus, it is the southernmost point of the Asian continental mainland. The area contains Peninsular Malaysia, Southern Tha ...

Sumatra Sumatra () is one of the Sunda Islands of western Indonesia. It is the largest island that is fully within Indonesian territory, as well as the list of islands by area, sixth-largest island in the world at 482,286.55 km2 (182,812 mi. ...

, and lowland

Borneo Borneo () is the List of islands by area, third-largest island in the world, with an area of , and population of 23,053,723 (2020 national censuses). Situated at the geographic centre of Maritime Southeast Asia, it is one of the Greater Sunda ...

. Its natural

habitat In ecology, habitat refers to the array of resources, 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 manifestation of its ...

is subtropical or tropical moist lowland

forest A forest is an ecosystem characterized by a dense ecological community, community of trees. Hundreds of definitions of forest are used throughout the world, incorporating factors such as tree density, tree height, land use, legal standing, ...

s. It was previously considered a

subspecies In Taxonomy (biology), biological classification, subspecies (: subspecies) is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (Morphology (biology), morpholog ...

of the

glossy swiftlet The glossy swiftlet (''Collocalia esculenta'') is a species of swift in the family Apodidae. It is found on the Indonesian island of Sulawesi and eastwards to New Guinea, the Bismarck Archipelago and the Solomon Islands. Taxonomy The glossy swi ...

Taxonomy

The plume-toed swiftlet was described by the English ornithologist

Robert Cecil Beavan Captain Robert Cecil Beavan (14 August 1841 – 3 February 1870), corresponding member of the Zoological Society of London, served in India with the Bengal Staff Corps for 10 years. During his short life he collected specimens of birds and egg ...

in 1867 and given current

binomial name In taxonomy, binomial nomenclature ("two-term naming system"), also called binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin grammatical forms, altho ...

''Collocalia affinis''. The type locality is

Port Blair Port Blair (), officially named Sri Vijaya Puram, is the capital city of the Andaman and Nicobar Islands, a union territory of India in the Bay of Bengal. It is also the local administrative sub-division (''tehsil'') of the islands, the headqu ...

in the

Andaman Islands The Andaman Islands () are an archipelago, made up of 200 islands, in the northeastern Indian Ocean about southwest off the coasts of Myanmar's Ayeyarwady Region. Together with the Nicobar Islands to their south, the Andamans serve as a mari ...

. The

specific epithet In Taxonomy (biology), taxonomy, binomial nomenclature ("two-term naming system"), also called binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin gramm ...

''affinis'' is Latin for "related" or "applied". The plume-toed swiftlet was previously treated as a subspecies of the

but was promoted to species status based on the results of a detailed analysis of the swiftlets in the genus ''

Collocalia ''Collocalia'' is a genus of Swift (bird), swifts, containing some of the smaller species termed "swiftlets". Formerly a catch-all genus for these, a number of its former members are now normally (though not by all authors) placed in ''Aerodramus ...

'' published in 2017. There are five subspecies: * ''C. a. affinis'' Beavan, 1867 –

Andaman and Nicobar Islands The Andaman and Nicobar Islands is a union territory of India comprising 572 islands, of which only 38 are inhabited. The islands are grouped into two main clusters: the northern Andaman Islands and the southern Nicobar Islands, separated by a ...

in the eastern

* ''C. a. elachyptera'' Oberholser, 1906 –

Mergui Archipelago The Mergui Archipelago (also Myeik Archipelago or ''Myeik Kyunzu''; ) is located in far southern Myanmar (Burma) and is part of the Tanintharyi Region. It consists of around 800 islands, varying in size from very small to hundreds of square kilo ...

off the west coast of southern

Myanmar Myanmar, officially the Republic of the Union of Myanmar; and also referred to as Burma (the official English name until 1989), is a country in northwest Southeast Asia. It is the largest country by area in Mainland Southeast Asia and has ...

* ''C. a. vanderbilti''

Rodolphe Meyer de Schauensee Rodolphe Meyer de Schauensee (; January 4, 1901 – April 24, 1984) was a Swiss-American ornithologist. Early life and education Meyer de Schauensee was born January 4, 1901 in Rome, Italy, one of two sons, to Baron Frederick Meyer de Schauens ...

& Ripley, 1940 –

Nias Island Nias (, Nias: ''Tanö Niha'') is an island located off the western coast of Sumatra, Indonesia. Nias is also the name of the archipelago () of which the island is the centre, but also includes the Batu Islands to the southeast and the small H ...

off the west coast of

* ''C. a. oberholseri''

Stresemann Stresemann is a German family name which may refer to: * Christina Stresemann (born 1957), German judge; daughter of Wolfgang Stresemann * Erwin Stresemann (1889 – 1972), German ornithologist * Gustav Stresemann Gustav Ernst Stresemann (; 10 ...

, 1912 – Batu and

Mentawai Islands Mentawai may refer to: * Mentawai Islands, Indonesia ** Mentawai Strait ** Mentawai people, ethnic group of Indonesia ** Mentawai language, their Austronesian language {{dab Language and nationality disambiguation pages ...

off the west coast of Sumatra * ''C. a. cyanoptila'' Oberholser, 1906 –

, Sumatra,

Natuna Islands Natuna Regency is an islands regency located in the northernmost part of the Province of Riau Islands, Indonesia. It contains at least 154 islands, of which 127 of them are reported as uninhabited. This archipelago, with a land area of 1,978.4 ...

and lowland

Description

The plume-toed swiftlet is in length with a square tail. The back and upper surface of the wings are uniformly dark greenish-blue with a moderate gloss. The throat and upper breast are dark grey merging into large greyish chevrons over the lower breast and flanks, usually becoming white over the belly. There is a tuft of small feathers on the , the rear facing toe. This species lacks a pale contrasting rump and has no white spots on the inner webs of the tail feathers.

References

plume-toed swiftlet Birds of the Andaman and Nicobar Islands Birds of Southeast Asia plume-toed swiftlet plume-toed swiftlet {{apodiformes-stub