Nazca boobies live in colonies on the Galapagos Islands.
A Nazca booby bites an unrelated chick. An October 2011 study finds that abused chicks are likely to grow up as abusers themselves.
Nazca boobies breed in giant colonies, and parents often leave their babies alone to go forage.
A Nazca booby mother (left) and her baby.
A mated pair of Nazca boobies with their nestling in a breeding colony.
An adult Nazca booby bites the shoulder of an unguarded nestling.
A Nazca booby sits on an egg.
A pair of Nazca boobies.