Appearance:

Summer: Red throat (seemingly black at a distance!). Lacks white vertical framing of throat patch and white spotted back of Black-throated Diver. Winter: Quite pale. White face and eye-ring. Just a narrow stripe of dark grey along the back of the neck. In all plumages best identified by posture and silhouette, especially when seen at a distance. Slender neck, head and bill. Flat chest. Usually shows no white flank patch. Bill usually held uptilted.

Sound:

In flight; nasal, dry, gooselike series of rhythmic cackling "ko-ko-ko". Most vocal when courting and breeding. A meowing drawn-out sound starting with a register break, then falling in pitch. Display call a far reaching rolling cyclic cooing, given in long sequences.

Song/display:

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

CC-sound:Lauri Hallikainen, Licence,Link.

Appearance:

Fairly large warbler with long tail, giving the whole bird an elongated look. Tertials, secondaries and coverts with rufous fringes in contrast to greyish brown back. Underparts pale with buff flanks. Outer tail feathers white. Steep forehead and white throat. Males with slate grey head.

Sound:

Variable. Usually recognized by fairly concise phrase, usually with three ascending and descending parts. Often ends with more indistinct mimicry, or subsong. May omit characteristic phrase and sing more cryptic for periods of time, and may be more difficult to identify. Warning call a harsh, drawn "weeet", usually with accented ending, sometimes rising abruptly in pitch.

Alarm call, song:

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