Feeding Behavior

Forages while swimming underwater. May dive to more than 150' below surface when foraging.

Eggs

One. Very variable, usually whitish, tan, blue, or green, with markings of brown, reddish, black. Incubation is by both sexes, 28-37 days. Young: Fed by both parents. Young leaves nest at 15-25 days, before able to fly; flutters down to water, is cared for and fed by parents at sea for several more weeks. Young is probably capable of flight at about 50-70 days.

Young

Fed by both parents. Young leaves nest at 15-25 days, before able to fly; flutters down to water, is cared for and fed by parents at sea for several more weeks. Young is probably capable of flight at about 50-70 days.

Diet

Mostly fish. Feeds on wide variety of fish, including herring, cod, capelin, sand lance, haddock, many others. Also eats various crustaceans, marine worms, squid.

Nesting

First breeds at age of 4-5 years. Nests in colonies. Displays by members of pair include pointing bill skyward, bowing deeply, clashing open bills together, preening each other's feathers. One (usually female) may return to nest site from sea with fish, present it ceremonially to mate. Nest site is on cliff ledge or on flat stony surface near water. Nests may be very close together, incubating birds well within touching distance. No nest built, egg laid on bare rock.