The Collaborative International Dictionary
Megalestris skua
Skua \Sku"a\, n. [Icel. sk?fr, sk?mr.] (Zo["o]l.) Any jager gull; especially, the Megalestris skua; -- called also boatswain.
Megalestris skua
Jager \Ja"ger\, n. [G. j["a]ger a hunter, a sportsman. Cf. Yager.] [Written also jaeger.]
(Mil.) A sharpshooter. See Yager.
(Zo["o]l.) Any species of gull of the genus Stercorarius. Three species occur on the Atlantic coast. The jagers pursue other species of gulls and force them to disgorge their prey. The two middle tail feathers are usually decidedly longer than the rest. Called also boatswain, and marline-spike bird. The name is also applied to the skua, or Arctic gull ( Megalestris skua).