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.
Booby Mom and Baby
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.
Nazca Booby on Nest
A Nazca booby sits on an egg.
Two Nazca Boobies
A pair of Nazca boobies.
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Stephanie Pappas is a contributing writer for Live Science, covering topics ranging from geoscience to archaeology to the human brain and behavior. She was previously a senior writer for Live Science but is now a freelancer based in Denver, Colorado, and regularly contributes to Scientific American and The Monitor, the monthly magazine of the American Psychological Association. Stephanie received a bachelor's degree in psychology from the University of South Carolina and a graduate certificate in science communication from the University of California, Santa Cruz.