​COCK-OF-THE-ROCK, the familiar name of the birds of the genus Rupicola (subfamily Rupicolinae) of the Cotingas (allied to the Manakins, q.v.), found in the Amazon valley. They are about the size of a pigeon, with orange-coloured plumage, a pronounced crest, and orange-red flesh, and build their nests on rock. The skins and feathers are highly valued for decoration.