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:

A small, tubby and compact owl with long legs, yellow eyes and stern expression. Head without tufts or any sharp corners, proportionally smaller than in Tengmalm's Owl, and without large, white facial discs. Upperparts greyish brown to buff, with boldest white spots of any small owl in the region. Underparts whitish with heavy, brown streaking. Flight characteristic, with alternating wing flapping and closed wings. Runs, or even hops along the ground. Posture mostly erect, but hunched when in alarm.

Sound:

Song a clear drawn "klooit" resembling Scops Owl, but with different intonation and longer single notes. Tone rises slowly in pitch throughout the call and ends with marked raised pitch, often with a change in timbre to a coarse shriek. Rich repertoire of social sounds: E.g. a clear "klewew", and sharp short "kek kek kek".

Song, 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

Featherbase

CC