The secret behind crows and ravens' global success is a combination of size and smarts, a new study finds.
Goffin's cockatoos play golf in an experiment exploring their ability to combine multiple objects into one tool.
A pair of same-sex penguins have incubated and hatched their first chick at a New York zoo, adding to the list of successful same-sex penguin foster parents.
Scientists in Antarctica have unexpectedly spotted a sub-Antarctic penguin breeding on the southernmost continent.
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