Appearance:

Unmistakable in breeding plumage, but otherwise easily confused with other marsh terns. Breeding plumage with black head and belly, but pale underwing and grey rump. When in immature and winter plumage it differs from Common and Arctic tern by smaller size and short, moderately forked tail, and from other marsh terns by slimmer body and wings (compared to White-winged tern), and relatively long, thin bill. Both immature and adult winter show dark front edge of wing, and characteristic dark shoulder patch at wing base. Back is dark in immature birds. Grey rump in all plumages. Flight usually different from Sterna-terns, with erratic dives for no apparent reason, and "aimless" change of direction. Note that when foraging over saltwater, flight becomes more Sterna-like.

Sound:

Moderately vocal. Flight call a more or less clear "kleck, or a disyllabic "klee-ake" with accented first syllable. Sometimes slightly rolling "klirr-eke", but never as much as in White-winged Tern. Also a slightly harsher "kreek", but not as raspy as in Whiskered Tern.

Flight call:

Distribution:

Wikipedia: map (se also Xeno-canto below)

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-sound:Ad Postma, Licence,Link.

Appearance:

Differs from Baillon's Crake in long primary projection in all plumages. At least 5 tips of primaries visible behind tertials. Adult birds show red base of bill, but this is sometimes difficult to see and immature may lack this altogether. Male with lead grey underparts, female with grey face and buff underparts. Immature with barred and spotted underparts but less so than immature Baillon's. The crown is also more evenly dark together with dark ear coverts. The species appears slimmer than Baillon's Crake due to longer neck, tail and legs.

Sound:

Rich repertoire of calls used freely in breeding season. Male song diagnostic. A loud series of short, nasal ascending "quek" repeated every one and a half seconds or so, before accelerating and descending at the same time to a more guttural voice. Female song with similar short "quek" but with less pure tone and in shorter series (sometimes just one call), immediately followed by a rolling trill.

Male song:

Distribution:

Wikipedia: map (se also Xeno-canto below)

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:Rudo Jureček, Licence,Link.

CC-Photo:Arie en Anneke Kolders, Licence,Link.

CC-Photo:Jorrit Vlot, Licence,Link.

CC-photo:gilgit2, Licence,Link.

CC-photo:gilgit2, Licence,Link.