Species:

White-winged Tern (Chlidonias leucopterus)

Pallas's Gull (Ichthyaetus ichthyaetus)

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Length (cm):
20-23
57-61
Wingspan (cm):
63-67
149-170
Weight (gram):
50-75
1100-1900
Size group:
Crow-size
Crow-size
Main Texts:
Appearance:

Breeding adult easily identified by white tail/rump combined with jet black under wing coverts and silvery upper wing. Immature with brownish back contrasting with pale, silvery upper wings and pale rump. Broad white collar, and lacks dark breast patch of immature Black Tern. Adult winter most liable to confusion with other terns, but upperparts much paler than Black Tern. Contrasting dark outer primaries and secondaries to rest of wing. Often retains some black under coverts even in winter which is diagnostic if seen. Slightly more compact than Black Tern and often recalls Little gull in shape. Bill noticeably shorter and thinner than in Whiskered Tern.

Sound:

Mostly silent away from breeding ground. Most diagnostic call a dry, rolling "krrrrrr-ta-ta" where the rolling is followed by one or two accentuated syllables, or just simply "krrrrrr". Used in excitement.

Call:

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See sound file


Distribution:

Xeno-canto: map

Ecology:

Birdlife ecology

Links:

Observation.org Latest observations

Video IBC

Image search Flickr NB! May give other species

Sound search at Xeno-canto

CC

CC-sound:Marco Dragonetti, Licence,Link.

CC-photo:Dick Hoek, Licence,Link.

CC-photo:Lars Buckx, Licence,Link.

Appearance:

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Sound:

Distribution:

Xeno-canto: map

Ecology:

Birdlife ecology

Links:

Observation.org Latest observations

Video IBC

Image search Flickr NB! May give other species

Sound search at Xeno-canto

Featherbase

CC

CC-photo:Ronald Bontrop, Licence,Link.

CC-photo:Roel Janssen, Licence,Link.

CC-photo:Paul Schrijvershof, Licence,Link.

Silhouette Group:
Gull-like
Silhouette
Gull-like
Silhouette
Several different images of the species
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Several different sounds of the species