Subalpine Warbler (Curruca cantillans)
Whiskered Tern (Chlidonias hybrida)
Medium small Sylvia with short tail, slender body and steep forehead. Bill slim,fairly short and pointed. Male with rufous breast and conspicuous, broad, white moustache stripes. Upperparts lead grey. Female with slightly more brownish upperparts and buff white below. Immature birds has greyish brown upperparts, and are prone to confusion with Spectacled Warbler due to broad, brown fringes of tertials. The colour is however less rufous, and the dark centre ends in a rounded, not pointed tip. Pale legs in all sexes and ages, but some variation. Eye-ring colour variable, but generally red in male and very pale in female and immature (rules out other Sylvia except Tristram and Sardinian). Colour of upperparts more uniform than in confusion species in both male and female. May cock tail, but does not keep it raised like Dartford Warbler. Taxonomy much discussed. Western Italian population now accepted as a separate species (Moltoni's Warbler, S. subalpina), while S. c. inornata has species status in Svensson, but not in Clements (2018) .
Sound:Alarm call a short, hard "tuk", but softer and fainter than Blackcap and Sardinian W. Song a rapid, vivid stream of squeaks and clearer notes, with timbre similar to Whitethroat. May be confused with Sardinian W., but lacks that species interwoven hard and rolling contact call.
Alarm, song:
Distribution:
Xeno-canto: map
Ecology:Birdlife ecology
Links:
Observation.org Latest observations
Image search Flickr NB! May give other species
CCCC-photo:adrien2008, Licence,Link.
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.