Appearance:

Always unmistakable. Distinct, foldable, fan-like crest. Rounded, rectangular wings and long curved bill. Buff body, black wings and tail with conspicuous white barring. Catches the eye when flying by in undulating, butterfly-like motion.

Sound:

Song a characteristic, hollow, far-reaching and trisyllabic "hoop-hoop-hoop". Dove-like timbre and slightly ascending in pitch. Sometimes two or four syllables, depending on virility of male. Other calls include a dry, hoarse and rasping "ehrrrrrr".

Song:

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:

White with black wing tips and yellow-buff at back of head. Juveniles brown with small pale speckles, white u-shaped rump patch and pale underparts. Fully coloured only after 5 years, and patchy, intermediate plumages often seen. Unmistakable bird at close range or with favorable light, but can be confused with shearwaters at a distance and/or in strong wind. Differs from those by long tail and much longer neck and head. Alternates between powerful, even and shallow wing-beats and glides. Flight becomes more shearwater-like in strong winds.

Sound:

Heard mostly at breeding ground. Even, rhythmical series of harsh "harrr, harrr, harrr,".

Social interaction:

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 Elias A. Ryberg,http://www.xeno-canto.org ,CC license