Species:

Gull-billed Tern (Gelochelidon nilotica)

Stock Dove (Columba oenas)

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Length (cm):
35-38
32-34
Wingspan (cm):
100-115
63-69
Weight (gram):
190-260
250-350
Size group:
Crow-size
Crow-size
Main Texts:
Appearance:

Easily confused with Sandwich Tern but choice of habitat usually different. Adults differs by noticeably shorter and deeper bill, lacking yellow tip. Wings are broader, tail is shorter and only slightly forked. Lacks crest. Primaries with dark trailing edge, especially underside. Rump pale grey, and there is no contrast between grey back and white tail as in Sandwich Tern. Loses the black cap in winter, but keeps a black mask (less black on head than Sandwich T). Immature birds also gives a paler impression. The back is almost uniform in colour, and the wings also have only diffuse markings. The dark trailing edge to the primaries is present though, together with dark eye mask. Rest of head is pale. Flight slightly front-heavy with shallow wing-beats. Catches insects in the air and from the ground in flight. Rarely plunge-dives. Prefers fresh water, and is often seen near wetlands, rivers and flooded fields, but also in salt water during migration.

Sound:

Quite vocal and easily distinguished from most congeners. Mewing and sharp in tone, but not rattling or raucous like most terns. Most typical call is a disyllabic, mewing "ke-waat", with an upward inflection. Other variants are series of "ke-ke-ke-ke", or the mewing sounds.

Contact call:

Error loading Flash for sound!
See sound file


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-sound:Stanislas Wroza, Licence,Link.

Appearance:

Clearly smaller than Wood Pigeon, and lacks white wing-patches. Most susceptible to confusion with Feral Pigeon. Differs from latter in incomplete dark wing-bars, covering only inner secondary coverts. Colour of back same grey tone as neck and head. Never with white patch at lower back. Underside of wings grey, with clearly defined dark frame. Black trailing edge of tail fairly broad.

Sound:

Song a two-syllable, cooing. Much louder and more accentuated first syllable than in Feral Pigeon. First a short ascending "oooh", immediately followed by a short descending "oohh". Tone quite pure, mostly lacking the rolling quality of Feral Pigeon.

Song:

Error loading Flash for sound!
See sound file


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

Featherbase

CC

Similar species (image):
Similar species (sound):
Silhouette Group:
Gull-like
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Pigeons
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Several different images of the species
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Several different sounds of the species