Appearance:

Very large, mostly unmistakable bird. Grey upperparts, white underparts and yellow/yellowish bill. Keeps neck retracted when flying (as opposed to crane). May be mistaken for Purple Heron, but back of neck grey, not brown. Bill heavy and dagger-shaped. Neck thicker and less angular than in Purple Heron. Unmarked cheeks.

Sound:

Quite vocal. Most common call a short, far reaching and extremely harsh, rasping sound. At breeding ground a varied repertoire of harsh and clattering sounds.

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

Appearance:

All black plumage, red legs and long, curved, red bill. Bill of juveniles yellowish-brown and shorter. Though never as pure yellow as in Alpine Chough, and more curved. Easily confused with Alpine Chough at a distance where both species occur, but note broader, more fingered wings, shorter and squarer tail with broader base and different calls. Flight extremely acrobatic.

Sound:

Call: A rapidly descending "keeaaaw", sometimes resembling a coarse jackdaw. At other times a more mewing sound, with similar coarseness, or a sharper, descending "kieew". Easily distinguished from the thin, trilling, whistling sounds of Alpine Chough.

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