Dropbears. The deadliest mammals in the outback, dropping down on unsuspecting prey!! This terrifying creature……. is not real, but it does make for a fun way to mess with people. The real animal is the laid back Koala (Phascolarctos cinereus), a eucalyptus eating marsupial in Australia. There are a few subspecies of this creature, with the Southern being the largest, found in South Australia and Victoria.