What is the difference between a wallaby and a wallaroo?

The main difference is the wallaroo is bigger than a wallaby. It is in between the size of a wallaby and a kangaroo. The wallaroo is particularly heavy-set and stocky, and usually has dark body parts such as the tail, snout and feet. Both marsupials, however, inhabit rocky hillsides and bushy country rather than the open countryside favoured by kangaroos.