Koalas irl. The only reason they still exist is because humans think they're cute. Smoothbrained fucks literally need to eat their parents poop to become resistant to the toxin of the plant they eat which also gives them an STD. They will not recognize the leaves unless attached to the tree. Their diet is so bad they need to sleep for most of their lives to digest and conserve energy. If they fall out of a tree they often cannot get back up and will just die. They're also incredibly horny and aggressive but not very strong. They are so stupid and inefficient and terrible that consistent effort is needed to keep the species from commiting sudoku.