The term 'Down Under Animal' refers to an animal native to Australia. The two crossword solutions for this term are KANGAROO (8 letters) and roo (3 letters). Kangaroos are large marsupials that are found in Australia and New Guinea, and they are known for their powerful hind legs and long tails. They are also the only large animals that can hop. Roo is a nickname for KANGAROO, and it is often used as a term of endearment.