Colony, Ceylon, and Burma. _C. aeruginosus_, now nearly exterminated in Britain, extends from South Scandinavia and Archangel to Japan, and to the Transvaal and Ceylon in the cold season. The upper parts are brown with blackish primaries, the remainder of the wings and the tail being grey; the lower surface is buff with brownish stripes. Old males have the head nearly cream-coloured, while the irides in the female are rather hazel than yellow. The North American _C. hudsonius_ is very near _C. cyaneus_; South America possesses _C. cinereus_, and, on the east, _C. maculosus_; _C. swainsoni_ reaches from South-East Europe to India and China, with Africa in winter; _C. ranivorus_ and _C. maurus_ occupy South Africa; _C. spilonotus_ and _C. melanoleucus_ East Asia, the latter being coloured black, white, and grey; _C. assimilis_ (_jardinii_)–marked with chestnut above, and spotted with white below–inhabits Australia and Tasmania; _C. gouldi_ (_approximans_) the same countries, New Zealand, and Fiji; _C. wolfi_ New Caledonia, _C. spilothorax_ Papuasia, _C. humbloti_ Madagascar, and _C. maillardi_ (with its variety _macrosceles_) that island, Réunion, and Anjuan (Joanna). {156}_Micrastur_, a genus found in Central and northern South America, somewhat resembles _Accipiter_, being brown or blackish above, relieved by rufous or grey and white, and white or reddish below with or without cross-bars. _Geranospizias_ ranges further south, _G. caerulescens_, which is slaty-blue, with a few white bands beneath, reaching South Brazil and Bolivia, while the Central American _G. niger_ is nearly uniform black. The thighs are closely feathered, and the tibio-tarsal joint is said to act doubly. Five species of _Melierax_ or "Singing Hawk," reside in the Ethiopian Region, especially in the south, where _M. canorus_ is plentiful. This form is ash-coloured with black primaries, black and white tail, and white belly with greyish bars. The habits are bold, the flight is rapid, the food consists of small mammals, birds, reptiles, and locusts. The haunts are in rocky places or bush country; the nest of sticks, lined with wool and feathers, is placed in a tree, and contains from three to five whitish eggs. The mellow whistling or piping song is heard chiefly in the morning and evening, the wide-spread African _Asturinula monogrammica_ alone of the Family vying with it in sweetness.