236. Hydrochelidon leucoptera.
THE WHITE-WINGED BLACK MARSH-TERN.
Male 9" to 10". Legs red. Bill livid red in summer, blackish in winter. Head, neck, mantle, below, and wing-lining black. Upper tail-coverts and tail white.— In winter: Parti-coloured and below white. Temperate Europe and Asia south of 55° N. lat. in summer. Africa to Australia in winter. Often met with in Ceylon, but not identified in India west of Tipperah. Eggs (1.3 x 0.9) chocolate, blotched grey and brown. (B. 1497.)