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see gullgull,
common name for an aquatic bird of the family Laridae, which also includes the tern and the jaeger. It is found near all oceans and many inland waters. Gulls are larger and bulkier than terns, and their tails are squared rather than forked.
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(Rissa tridactyla) also black-legged, or Atlantic, kittiwake, a bird of the family Laridae. The body length measures about 40 cm, and the weight about 400 g. The back and wings are bluish gray on top, and the flight feathers are black with white spots at the tips. The remaining plumage is white. The kittiwake is distributed in the northern parts of the Atlantic and Pacific oceans and in the Artie Ocean. It nests on coastal cliffs and on islands in colonies of up to several tens of thousands of couples. Together with murres, the kittiwakes form large breeding colonies.

The kittiwakes build their nests out of grass and mud on rock ledges. There are two or three eggs per clutch, and both the male and female incubate them for about 25 days. The plumage of the young grows in at about one month, at which time the young begin to fly. During the nonreproductive period kittiwakes travel widely over the open water, feeding on small fish and on invertebrates, which they snatch from the surface of the water. The red-legged kittiwake (R. brevirostris) nests on the Komandorskie and Aleutian islands.


either of two oceanic gulls of the genus Rissa, esp R. tridactyla, having a white plumage with pale grey black-tipped wings and a square-cut tail
References in periodicals archive ?
Furthermore, discriminant analysis of ledge measurements indicated that there was considerable multivariate overlap in physical characteristics of natural ledges used by Red-legged and Black-legged Kittiwakes. A cross-validation analysis of a discriminant model that incorporated six variables (ledge width, ledge length, ledge slope, back wall slope, and back wall height) correctly classified 76% of Red-legged Kittiwake nesting ledges and 70% of Black-legged Kittiwake nesting ledges.
In the Black-legged Kittiwake, several behavioral observations explain the results of predictions 1, 2, and 3.
Glaucous-winged Gull (Reid 1987) and Black-legged Kittiwake (Jacobsen et al.
Black-legged kittiwake colonies in the Canadian High Arctic that have recently been reassessed, showing locations and census estimates made since 1972.
Many species of seabirds, including Black-legged Kittiwakes (Rissa tridactyla), forage in flocks (Lack 1968, Sealy 1973, Hoffman et al.
The black-legged kittiwake probably acts as a "catalyst" species in the Barents Sea area, and the murres might be guided to the prey aggregations by the conspicuous flocks of foraging kittiwakes.
ice edge E, boat ice edge W, boat Black-legged kittiwake: ice edge E, boat ice edge W, boat [Part 2 of 2] TABLE 3.
For instance, populations of black-legged kittiwakes have declined by more than 50% in the North Sea since 1990.
Along with the muskoxen, other wildlife is abundant, and we enjoyed watching and photographing black guillemots, black-legged kittiwakes, snowy owls, Arctic terns, and many other birds.
Vulnerable species include black-legged kittiwakes, common guillemots, and Atlantic puffins.
The petition states: "Black-legged kittiwakes are a tiny, almost ternlike, pelagic gull which breed on rocky cliffs around Britain.
200 bp), thick-billed murres (Uria lomvia; 250 bp; Montevecchi and Tuck, 1987), black-legged kittiwakes (Rissa tridactyla; ca.