_Tachyeres cinereus_, the Logger-head or Steamer Duck, of Chili, the Falklands, and Straits of Magellan, is grey in both sexes, with lighter head, rufous throat, white secondaries and belly, orange-yellow bill and feet. The narrow median rectrices are curled up, the wings very short; while the adults apparently lose the power of flight. Darwin well describes the noisy splashing action, the rapid and flapping swimming movements, the weak diving powers, the strong beak adapted for extracting shell-fish, and the voice like that of a bull-frog.[115] From seven to nine eggs are laid among herbage or low bushes. _Fuligula marila_, the Scaup, of Northern Europe, Asia, and America, which migrates to the Mediterranean and Black Seas, North India, China, and Guatemala, has the head, neck, and chest greenish-black, the back vermiculated with black and white,[116] the wings and tail dusky, the speculum and under parts white, the bill and feet plumbeous. The female is chiefly brown above, with {122}white round the base of the bill. _F. affinis_, of North America, has the head purplish; _F. cristata_, of the whole Palaearctic area, breeding freely in Britain and apparently in the Abyssinian highlands, while wintering in India, Japan, China, the Malay Archipelago and Polynesia, is distinguished by an occipital crest, and in the male by a black back. _F. novae zealandiae_, of New Zealand, the Auckland and Chatham Islands, has a purple and green gloss above, a few white dots on the back, and rufous-brown abdominal feathers, the latter being brown and white in the female. _F. collaris_, of North America generally, has a violet tinge on the black portions, a chestnut collar, a blue-grey speculum, and white under parts barred with dusky; the bill shows two whitish bands; the female has white lores and throat.