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:

At a distance quite similar to Guillemot. Bill deep, rectangular and with white markings. Flanks unstreaked and armpits white. Tail longer than in Guillemot, with legs not protruding behind tail in flight. Tail often held clear of the surface when swimming. Cheeks white in winter, with broad, short and black eye stripe. Neck collar short and wide. Upperparts blacker, and underparts whiter than Guillemot. Heavy neck, head and bill, in combination with the long tail, gives it a front heavy, and different profile from Guillemot, whether perched, swimming or flying. Top of head in line with tip of uptilted bill when swimming.

Sound:

Very coarse and deep voice. Grunting or snore-like, with little phrasing. Mostly heard at breeding ground, but also sometimes at sea.

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

Sounds:Recorded by Simon Elliott,http://www.xeno-canto.org ,CC license