Appearance:

Unmistakable, if not in silhouette. In poor light or at a distance, when the grey plumage is not visible, confusion with other crows is possible. Bill is deeper than in Rook, and the upper mandible more curved towards the tip. Smaller than raven, and much less heavy bill. The wings are shorter and more rounded, and the tail is not wedge-shaped. Posture less upright than Rook.

Sound:

Cawing is aggressive and more raucous than in Rook, with more rolling r's. Has a large repertoire of seldom heard calls, and even sub-song. Many of these calls are surprisingly resonant and pleasant sounding, and sometimes resembles Raven. Probably impossible to tell from Carrion Crow with certainty by sound alone.

Cawing:

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:

Unmistakable. Extremely long tail and short wings. Fluttering and undulating flight, with peculiar silhouette like a small ball with a long tail. Head of Northern Europe sub.sp. completely white. Continental and British birds with broad, dark supercilium. Juveniles head dark with white crown and throat. Always active and on the move in small groups.

Sound:

Song: Rapid, continuous, randomly composed sequence of bubbling,chirping sounds. Call: quite short, chirping, twittering "tzzirrret tzirrrret". Often starting at high pitch and rapidly falling, or just flat. Also a thin, slightly falling "zi zi ziii".

Contact call:

Distribution:

Xeno-canto: map

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