Great cormorants nesting. A pair of great cormorants (Phalacrocorax carbo) at their nest. Cormorants are coastal seabirds that feed on fish, and are found worldwide. The great cormorant nests on cliff ledges or in trees in coastal areas, but also increasingly inland. Nests are built from seaweed or twigs, and three or four eggs are laid. Photographed in India.