Razorbill
in ornithology, the Alca torda, the sole species of the genus Alca impennis, the great auk, being extinct.
It is about a foot and a half long, plumage of head, neck, and upper surface brilliant black, under surface pure white.
They make no nest, but lay a single white or yellowish egg blotched and streaked with dark-brown, on the bare rock. Called also the black-billed auk and murre.