216. Nycticorax griseus.
THE NIGHT HERON.
Wak, India; Gadri, Sind; Sannari, Ceylon; Lin-wet, Burma.
Male 21" to 24". Legs greenish. Bill black. Eye-streak white. Crown, nape, back, and scapulars black, glossed green. Crest of narrow, feathers fitting into each other. Cheeks, chin, throat, and abdomen white. C. and S. Europe, Asia, Africa, N. America, W. Indies, India, Ceylon, and Burma. Four or five eggs (1.92 x 1.35), pale sea-green. (J. 937. B. 1568.)
Also N. tayazuguira. 24". Similar to N. griseus, but beneath pale grey. From S. America. N. cyanocephalus. 24". Beneath dark slaty. From south of S. America. N. leuconotus. 20". Black above, with white patch on back. From Africa. N. caledonicus. 19 1/2". Tail chestnut, eyebrow white. From Australia. N. crassirostris. 22". Similar to N. caledonicus. From Bonin Islands. N. mandibularis. With white throat and no white eyebrow. From Solomon Islands. N. manillensis. 25". Similar to N. caledonicus, but no white eyebrow. From the Philippines and Borneo.
Also the genus Nyctinassa. With crest of nuchal plumes, dorsal plumes greatly developed, plumage slaty blue. Two species— N. violacea, 22", Crown white, from N. and S. America; and N. pauper, 16", crown black, from the Galapagos.
Also the genus Cancrema. With bill flattened, broader than high. Two species— C. cochlearia, 16", the Boatbill, with throat and chest white, from S. America; and C. zeledoni, 18", with throat and chest tawny, from C. America.
Culmen not so long as tarsus.