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.
Stephanie Pappas, Live Science Contributor
Stephanie Pappas is a contributing writer for Live Science. She covers the world of human and animal behavior, as well as paleontology and other science topics. Stephanie has a Bachelor of Arts in psychology from the University of South Carolina and a graduate certificate in science communication from the University of California, Santa Cruz. She has ducked under a glacier in Switzerland and poked hot lava with a stick in Hawaii. Stephanie hails from East Tennessee, the global center for salamander diversity. Follow Stephanie on Google+.