Swallow-tailed gull

(redirected from Creagrus)
Related to Creagrus: Great black backed gull
(Zool.) an Arctic gull (Xema furcata), which has a deeply forked tail.

See also: Swallow-tailed

References in periodicals archive ?
Stenhouse and others (2001) classified the Sabine's Gull as a "solitary low-density" nester, and reported that of 4 closely related species (Sabine's Gull; Black-legged Kittiwake, Rissa tridactyla; Ivory Gull, Pagophila eburnea; and Swallow-tailed Gull, Creagrus furcatus; Chu 1998; Pons and others 2005), only the Sabine's Gull is often a solitary nester.
Breeding ecology of the Swallow-tailed Gull, Creagrus furcatus.