The website of the Australian Museum contains an entry for the drop bear written in a serious tone similar to entries for other, real, species. The entry classifies the drop bear as Thylarctos plummetus and describes them as "a large, arboreal, predatory marsupial related to the koala", the size of a leopard, having coarse orange fur with dark mottling, with powerful forearms for climbing and attacking prey, and a bite made using broad powerful premolars
https://en.wikipedia.org/wiki/Drop_bear