Appearance:

Unmistakeable in all of WP except for Egypt where Senegal Thick-knee occurs. Differs from said species by more yellow on bill and only narrow white band on coverts framed in black (less prominent in immatures). Mostly nocturnal and easily overlooked at daytime when resting. Runs for cover with hunched posture if disturbed. Easily identified in flight by dark wing with white window, long tail and trailing toes. Betrays it's presence at dusk when groups of birds often starts calling and moving about.

Sound:

Very vocal at twilight with various wailing, curlew-like calls, undulating in crescendoes, often in joined choruses. Most typical call a cyclic "turrru-leeek", with rolling "r" and second part higher pitched (at end of sound file).

Two types of 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

CC-photo:Frank.Vassen, Licence,Link.

Appearance:

Small, compact diving duck with short neck and rounded head. Males with diagnostic tuft, white flanks and black back. Females with rudimentary tuft, mostly dark brown body, with varying white feathering at base of bill. Females in winter showing much white at base of bill are easily mistaken for Scaup, but note hint of small tuft, smaller head, broad black nail of bill and no white cheek spots. Both sexes show long, white wing stripes in flight.

Sound:

Male display sound: High pitched short whistling-like noises, "pjuu-uu", not very audible. Both sexes have harsh "ahrrrr" calls like other diving ducks, sometimes with a crow-like quality.

Female:

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 Stein Ø. Nilsen,http://www.xeno-canto.org ,CC license