The San Diego Zoo has the largest koala colony—as well as the most successful koala breeding program—outside of Australia.

Known as the bushman’s alarm clock, a laughing kookaburra vocalizes in its family group at dawn and dusk—with a loud call that sounds like a variety of trills, chortles, belly laughs, and hoots.

When a group of Tasmanian devils feeds together, harsh screeching and spine-chilling screams can often be heard—which may have led to their unusual name.