Appearance:

Differs from Common and Arctic Tern by; noticably shorter wings, longer streamers, much paler grey upperparts, pure white underparts (faint rosy wash not very conspicuous), black bill (red base in breeding birds), dark outer primaries and no dark edge to inner primaries. Amount of red in bill increases as breeding season progresses, but also varies geographically. Wingbeats shallower and much quicker than in Common and Arctic Tern. Fishes with characteristic diagonal dives. Despite the long streamers, the birds appear short-tailed in flight, but head and bill are long and slender. The pale plumage, dark bill and giss recalls a small Sandwich Tern. Adult winter plumage with all dark bill and white forehead. Juveniles resembles juvenile Sandwich Terns, with more complete dark cap than Arctic and Common, and much more contrasting markings on back (especially to wings).

Sound:

Extremely harsh calls. Like mix of Caspian and Arctic Tern. Very hard and raspy "kreeeet", harder and higher pitched than Caspian Tern, but equally harsh. Other calls include more Arctic/Common tern-like short "kek", and similar.

Contact 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

CC

CC-photo:USFWS/Southeast, Licence,Link.

CC-photo:Werner Witte, Licence,Link.

CC-photo:Anita363, Licence,Link.

CC-photo:Mike Prince, Licence,Link.

Appearance:

Large dabbling duck. In all plumages distinguished from other dabbling ducks by its slim neck and elegancy. Male with dark brown head, white breast and lower neck, with white wedges extending upwards on side of neck. Long, pin-like tail. Female mostly brown, wattled plumage, with longer tail than other dabbling duck females. Both sexes with bluish bill. Speculum dark green with broad white rear edge. Front edge buff in males. Edges more prominent in flight than the actual speculum. Flight pattern closer to Wigeon than Mallard.

Sound:

Female: similar to Mallards coarse laughing sound, but with a more emphasized first "haaa", and a more silent accelerating subsequent "laugh". Male: Pleasant, resonant "plop" similar to Teal, but lower pitched, richer, mellower and not so metallic. Accompanied by a higher pitched, slightly raspy whistling "aiiooo" rising and falling in pitch.

Display-call male:

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

Sounds:Recorded by Jarek Matusiak,http://www.xeno-canto.org ,CC license