Appearance:

Largely unmistakable, but might be mistaken for an egret when at a distance. Differs from these in bill-shape and in neck held straight (not retracted) in flight. Plumage white with yellowish half collar and neck tuft in breeding season. Bill and legs dark. Immature birds with black tips to primaries and pinkish bill. Characteristic feeding behaviour with sweeping bill-motions from side to side. Wing-beats slower than Glossy Ibis, and flocks generally fly in single file.

Sound:

Mostly silent, and of little use for identification. Soft utterances can be heard when feeding, and when interacting at nest.

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

CC

CC-photo:Agustín Povedano, Licence,Link.

Appearance:

Yellow legs, black to dark grey back (regional variations) and black primaries with only small white spots. Generally more slender than Herring Gull and Great Black-backed, with longer and more narrow wings, and longer legs. Winter plumage with streaked head and neck. Underside of flight feathers smoky grey. Juveniles very variable, but generally darker than Herring Gulls. Young birds with completely dark inner primaries and broad terminal band to tail.

Sound:

Very similar to Herring Gull, but tone more nasal.

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 Peter Boesman,http://www.xeno-canto.org ,CC license