In a new study released in a Royal Society journal, and reported by the BBC, researchers used a small device that monitors activity patterns in the brain that are associated with sleep. They found that wild sloths don’t quite live up to their lazy reputation.

While sloths in captivity have been known to sleep 16 hours per day, the new research suggests that this only happens because these animals have all of their needs met by humans.

Measurements showed that the wild sloths slept only 9.6 hours per day on average. The difference may result from the fact that sloths in the wild must find food and avoid predators.

Despite the new findings, sloths are still the slowest animals in the world. Watch this sloth in NATURE’s “Deep Jungle” try to out-maneuver a predator — and lose.