Lesser Kestrel (Falco naumanni) -> Lesser Black-backed Gull (Falco naumanni) - BirdID's Bird Guide - Nord University

Species:

Lesser Kestrel (Falco naumanni)

Lesser Black-backed Gull (Larus fuscus)

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Iceland Gull

Length (cm):

29-32

52-64

Wingspan (cm):

58-72

117-134

Weight (gram):

90-208

620-1000

Size group:

Crow-size

Bigger than a crow

Main Texts:

Appearance:

Easily confused with Kestrel, especially in female and immature plumage. Adult male with clean, grey cheeks, no moustache-stripe and no streaking on crown. Upper wing, greater coverts are grey, contrasting with brick red forewing and back without dark spots. Belly sparsely spotted. Underside of wings paler with less barring than Kestrel, and with more pronounced dark wing tips and trailing edge. This is also more or less visible in females and young birds. Female and young birds has a less stern look than Kestrel, due to more faint facial markings. Mask do not extend behind the eye. Tail slighty shorter than Kestrel, usually with central feathers slightly elongated (rare in Kestrel). Talons pale, not black. Flight light and fast, with shallow wing-beats. Hovers less than Kestrel, but soars on up-winds. Identification of female/immature birds requires a combination of plumage, structural and behavioural (flight action) characters.

Sound:

Contact call diagnostic, and quite different from Kestrel. A di- or trisyllabic "che che che", resembling Partridge in timbre, with two first syllables accentuated. Frequently used in colonies an din flocks. Also a Kestrel-like, plaintive trill "vriiiiii".

Contact call:

Error loading Flash for sound!
See sound file

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

CC-sound:Patrik Åberg, 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.