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| − | [[Image:Chlidonias leucopterus by michha62.jpg|thumb|550px|right|Adult summer<br>Photo by {{user|michha62|michha62}}<br />Location: Biebrza, [[Poland]] ]] | + | [[Image:Chlidonias leucopterus by michha62.jpg|thumb|550px|right|Adult summer<br />Photo by {{user|michha62|michha62}}<br />Location: Biebrza, [[Poland]] ]] |
;[[:Category:Chlidonias|Chlidonias]] leucopterus | ;[[:Category:Chlidonias|Chlidonias]] leucopterus | ||
Alternative name - White-winged Black Tern | Alternative name - White-winged Black Tern | ||
==Identification== | ==Identification== | ||
| − | [[Image:White-winged_Tern.jpg|thumb|350px|right|Adult summer in flight<br>Photo by {{user|zhangyong|zhangyong}}<br>Location: Hebei, [[China]]]] | + | [[Image:White-winged_Tern.jpg|thumb|350px|right|Adult summer in flight<br />Photo by {{user|zhangyong|zhangyong}}<br />Location: Hebei, [[China]]]] |
| − | A small marsh tern, 23-27 cm long, 58-67 cm wingspan, 42-79 g weight.<br> | + | A small marsh tern, 23-27 cm long, 58-67 cm wingspan, 42-79 g weight.<br /> |
Short red legs, short dark red bill, black neck, pale gray belly, very dark grey back, white rump, light grey tail, yellowish face, white wings, inner wing is grey with brown-tipped coverts. In non-breeding plumage, most of the black is replaced by white or pale grey; head with white forehead, black-brown crown, flecked with white, and the hindcrown is blackish with a certain amount of white flecking, broad and white collar; bill becomes black. In juveniles and moulting adults, the rump is pale grey, becoming grey in both phases late in the year. The clear white collar and rump isolate the mantle as a dark brown 'saddle'. The mantle feathers have narrow paler brown tips, as have the tertials and scapulars.<sup>[[#References|[1]]]</sup> | Short red legs, short dark red bill, black neck, pale gray belly, very dark grey back, white rump, light grey tail, yellowish face, white wings, inner wing is grey with brown-tipped coverts. In non-breeding plumage, most of the black is replaced by white or pale grey; head with white forehead, black-brown crown, flecked with white, and the hindcrown is blackish with a certain amount of white flecking, broad and white collar; bill becomes black. In juveniles and moulting adults, the rump is pale grey, becoming grey in both phases late in the year. The clear white collar and rump isolate the mantle as a dark brown 'saddle'. The mantle feathers have narrow paler brown tips, as have the tertials and scapulars.<sup>[[#References|[1]]]</sup> | ||
====Similar species==== | ====Similar species==== | ||
| − | [[Image:Chlidonias leucopterus by SeeToh.jpg|thumb|350px|right|Adult winter<br>Photo by {{user|SeeToh|SeeToh}}<br>Location: Singapore; October 2014]] | + | [[Image:Chlidonias leucopterus by SeeToh.jpg|thumb|350px|right|Adult winter<br />Photo by {{user|SeeToh|SeeToh}}<br />Location: Singapore; October 2014]] |
[[Black Tern]] is easily distinguished in breeding plumage by its dark grey wings and black bill. Juvenile and winter birds are more difficult, with the black half-collar and grey rump of Black Tern picking it out from the white neck and rump of White-winged Tern. [[Whiskered Tern]] is also a potential confusion species in winter plumage, best distinguished by its head pattern (white crown and dark mark through its eye, more like a miniature [[Gull-billed Tern]]) and pale grey rump. | [[Black Tern]] is easily distinguished in breeding plumage by its dark grey wings and black bill. Juvenile and winter birds are more difficult, with the black half-collar and grey rump of Black Tern picking it out from the white neck and rump of White-winged Tern. [[Whiskered Tern]] is also a potential confusion species in winter plumage, best distinguished by its head pattern (white crown and dark mark through its eye, more like a miniature [[Gull-billed Tern]]) and pale grey rump. | ||
==Distribution== | ==Distribution== | ||
| − | [[Image:Chlidonias leucopterus by tracker.jpg|thumb|350px|right|Juvenile<br>Photo by {{user|tracker|tracker}}<br>Location: Liverpool, UK; September 2005]] | + | [[Image:Chlidonias leucopterus by tracker.jpg|thumb|350px|right|Juvenile<br />Photo by {{user|tracker|tracker}}<br />Location: Liverpool, UK; September 2005]] |
Breeds in well-vegetated wetlands in southern and eastern [[Europe]] (eastwards from the Po Valley in [[Italy]] and [[Poland]] eastwards across central [[Asia]] to southeasternmost [[Russia]]. The largest populations are on the steppes of [[Kazakhstan]] and southern Russia. | Breeds in well-vegetated wetlands in southern and eastern [[Europe]] (eastwards from the Po Valley in [[Italy]] and [[Poland]] eastwards across central [[Asia]] to southeasternmost [[Russia]]. The largest populations are on the steppes of [[Kazakhstan]] and southern Russia. | ||
Revision as of 00:14, 14 December 2014
- Chlidonias leucopterus
Alternative name - White-winged Black Tern
Identification
A small marsh tern, 23-27 cm long, 58-67 cm wingspan, 42-79 g weight.
Short red legs, short dark red bill, black neck, pale gray belly, very dark grey back, white rump, light grey tail, yellowish face, white wings, inner wing is grey with brown-tipped coverts. In non-breeding plumage, most of the black is replaced by white or pale grey; head with white forehead, black-brown crown, flecked with white, and the hindcrown is blackish with a certain amount of white flecking, broad and white collar; bill becomes black. In juveniles and moulting adults, the rump is pale grey, becoming grey in both phases late in the year. The clear white collar and rump isolate the mantle as a dark brown 'saddle'. The mantle feathers have narrow paler brown tips, as have the tertials and scapulars.[1]
Similar species
Black Tern is easily distinguished in breeding plumage by its dark grey wings and black bill. Juvenile and winter birds are more difficult, with the black half-collar and grey rump of Black Tern picking it out from the white neck and rump of White-winged Tern. Whiskered Tern is also a potential confusion species in winter plumage, best distinguished by its head pattern (white crown and dark mark through its eye, more like a miniature Gull-billed Tern) and pale grey rump.
Distribution
Breeds in well-vegetated wetlands in southern and eastern Europe (eastwards from the Po Valley in Italy and Poland eastwards across central Asia to southeasternmost Russia. The largest populations are on the steppes of Kazakhstan and southern Russia.
Winters also on freshwater (unlike Black Tern, which mainly winters at sea), throughout sub-saharan Africa, across southern Asia and northern and eastern Australia; small numbers reach New Zealand, where it has also bred once[1].
Rare in western Europe on migration west to Ireland, also a vagrant in North America.
Taxonomy
This is a monotypic species[2]..
Habitat
In or near bodies of fresh water and freshwater marshes.
Behaviour
Nesting
They build a nest of small reed stems and other vegetation, placed either on floating vegetation in a marsh or on the ground very close to water. Two to four eggs are laid.
Diet
The diet mainly comprises insects and crustaceans, and to a lesser extent small fish.
Vocalisation
<flashmp3>Chlidonias leucopterus (song).mp3</flashmp3>
Listen in an external program
References
- Del Hoyo, J, A Elliot, and J Sargatal, eds. 1996. Handbook of the Birds of the World. Volume 3: Hoatzin to Auks. Barcelona: Lynx Edicions. ISBN 978-8487334207
- Clements, JF. 2010. The Clements Checklist of Birds of the World. 6th ed., with updates to December 2010. Ithaca: Cornell Univ. Press. ISBN 978-0801445019. Spreadsheet available at http://www.birds.cornell.edu/clementschecklist/Clements%206.5.xls/view
- Wikipedia
Recommended Citation
- BirdForum Opus contributors. (2024) White-winged Tern. In: BirdForum, the forum for wild birds and birding. Retrieved 26 April 2024 from https://www.birdforum.net/opus/White-winged_Tern
External Links
