Large and bulky diver with yellow or whitish, heavy bill and square head profile with steep forehead. Usually holds bill uptilted, not pointed straight like Great Northern Diver. Summer: White underparts and chequered black back. Black head and neck with white horizontal band. Winter: White underparts and grey back. Neck usually much more diffusely marked than in Great Northern Diver. Heavy goose-like flight.
Sound:Song similar to Great Northern Diver, but slower and harsher. Not very vocal.
Song:
Distribution:
Wikipedia: map (se also Xeno-canto below)
Ecology:Birdlife ecology
Links:Observation.org Latest observations
Image search Flickr NB! May give other species
CCCC-photo:Seabamirum, Licence,Link.
CC-photo:Bering Land Bridge National Preserve, Licence,Link.