White-winged Snowfinch (Montifringilla nivalis)
Whiskered Tern (Chlidonias hybrida)
Unmistakalble where there is no overlap with Snow Bunting (almost always). Anonymous brown bird with white wing patch when seen foraging on ground. Views in flight are dominated by the white on wings and tail. Fairly long-tailed and passer-like. Distinguishable from Snow Bunting in all plumages by the combination of grey head and brown back. Bill dark in breeding season, and yellowish in winter. Female similar to male but slightly duller coloured. Does not perch in trees. Erect posture and frequent tail-flicking when foraging on the ground. Flight less loose than Snow Bunting, with more frequent glides on stiff wings.
Sound:Rich repertoire. Song a staccato, variable phrase, consisting of short burst of sharp chattering in uneven tempo. The timbre is ringing, rich in harmonics and partly rolling. Among the various contact call the commonest are a high-pitched, sharp "zeet", a deeper, Brambling-like "veet, or a sparrow-like "peea". Alarm call a rolling "trr-r-r-rt", resembling Crested Tit.
Alarm, contact call, song:
Distribution:
Xeno-canto: map
Ecology:Birdlife ecology
Links:
Observation.org Latest observations
Image search Flickr NB! May give other species
CCPhoto by Paul Cools. CC-license
Largest marsh tern. Liable to confusion with Sterna terns due to black cap, in addition to other marsh terns. All marsh terns (Chlidonias) differs from Sterna by lack of tail streamers, short tail with shallow fork, shorter wings and stiffer flight. Marsh terns don't plunge-dive for food but picks from surface (though Whiskered Tern may belly-plunge), mostly in fresh water. Adult Whiskered Tern easily told from other marsh terns by distinct black cap contrasting to white cheeks and throat. Underwing pale with diffuse dark trailing edge. Belly distinctly darker than Common- and Arctic Tern, but beware of variation in both species. Bill dark blood red. Adult winter: Very pale with no distinct markings except for ill-defined black mask stretching from eye to eye across nape. Forehead white and with crown white speckles. Bill black. Immature: Yellowish brown saddle with coarse dark pattern, though these are moulted in early autumn. Usually lacks dark carpal bar and cap ill-defined. Whiskered Tern generally stockier built than other marsh terns. Both immatures and adult winter show grey rump (different from Common, Arctic and White-Winged), and bill is dagger-shaped (most apparent in males).
Sound:Contact call freely used and fairly distinct: An extremely hoarse, and rasping "krreek" in various moods. Timbre comparable to Corncrake. Sometimes uttered in stuttering series "kr-kr-kr-kr-kr".
Contact call:
Distribution:
Xeno-canto: map
Ecology:Birdlife ecology
Links:
Observation.org Latest observations
Image search Flickr NB! May give other species
CCCC-sound:Patrik Åberg, Licence,Link.
CC-photo:Jurrien van Deijk, Licence,Link.
CC-photo:Geert Moris, Licence,Link.