Drop bears are carnivorous, tree-dwelling marsupials found throughout Australia. Their preferred dwelling is eucalyptus trees or gum trees. They are related to koala bears, though larger and equipped with sharp teeth and razor-like claws. Sometimes people refer to them as the koala bear's evil twin.
Drop bears prefer to feed at night. They wait in trees and then drop down on top of their prey, usually instantly knocking it unconscious. They will then proceed to devour it. They will quite readily attack creatures larger than themselves, including humans.
The only known way to deter a drop bear is to spread toothpaste or vegemite behind your ears and on your neck. It also makes sense not to pitch your tent beneath a tree that contains a drop bear. A good way to find out if a drop bear is in a tree is to lie down beneath the tree and spit upwards. If a drop bear is sleeping up there, it will wake up and spit back.
Australians are known for going to great lengths to make sure that backpacking tourists are aware of the dangers posed by drop bears. Young children attending camp are also frequently warned of this threat to their safety.