239. Sterna anglica.
THE GULL-BILLED MARSH-TERN.
Male 14" to 16". Legs black. Bill black. Front, crown, and nape black. Sides of head white. Five primaries tipped on inner webs. Below white.— In winter: Head white, streaked grey and black. Temperate and warm regions of Old World (except S. Africa), America, but almost unknown on the Pacific side. Common in India and Ceylon. Eggs intermediate in character between those of Terns and Gulls (2.0 x 1.46). (J. 983. B. 1499.)