Yellow-browed Warbler (Phylloscopus inornatus)
Black Tern (Chlidonias niger)
Small and secretive warbler, usually discovered by the contact call. Broad, yellow/whitish wing-bars framed in black, and dark tertials with pale fringes gives the species a contrasting plumage. Long and strong yellow supercilium (lacking the orange base of Pallas' Leaf Warbler). No central crown-stripe. Slightly smaller than a Chiffchaff, with smaller bill and shorter tail. Rump same colour as back (as opposed to Pallas'), and overall greener and more strikingly coloured than Hume's Leaf Warbler (but beware individual variation).
Sound:Contact call and song both distinct. Contact call a very high-pitched "zeeoooee", with pitch rapidly dropping in the middle, and ending on a quickly rising note. Song an ornamented, drawn out, slow-motion version of the contact call, with similar timbre and pitch.
Contact call:
Distribution:
Xeno-canto: map
Ecology:Birdlife ecology
Links:
Observation.org Latest observations
Image search Flickr NB! May give other species
CCCC-photo:Langham Birder, Licence,Link.
Sounds:Recorded by Jelmer Poelstra,http://www.xeno-canto.org ,CC license
Unmistakable in breeding plumage, but otherwise easily confused with other marsh terns. Breeding plumage with black head and belly, but pale underwing and grey rump. When in immature and winter plumage it differs from Common and Arctic tern by smaller size and short, moderately forked tail, and from other marsh terns by slimmer body and wings (compared to White-winged tern), and relatively long, thin bill. Both immature and adult winter show dark front edge of wing, and characteristic dark shoulder patch at wing base. Back is dark in immature birds. Grey rump in all plumages. Flight usually different from Sterna-terns, with erratic dives for no apparent reason, and "aimless" change of direction. Note that when foraging over saltwater, flight becomes more Sterna-like.
Sound:Moderately vocal. Flight call a more or less clear "kleck, or a disyllabic "klee-ake" with accented first syllable. Sometimes slightly rolling "klirr-eke", but never as much as in White-winged Tern. Also a slightly harsher "kreek", but not as raspy as in Whiskered Tern.
Flight call:
Distribution:
Wikipedia: map (se also Xeno-canto below)
Ecology:Birdlife ecology
Links:
Observation.org Latest observations
Image search Flickr NB! May give other species
CC