Tasmanian Tiger

The Tasmanian Tiger is a carnivorous marsupial (Thylacinus cynocephalus) of Tasmania, resembling a large dog, with a brownish coat and dark stripes across its back. It is believed to be extinct.

Behavior
They are protective towards members of the same species, becoming hostile if you attack one of them. They are also carnivorous, eating rodents, birds, meat and body parts.

Trivia

 * Weirdly, the DS game used to classify this creature as a feline. But in real-life they were totally unrelated.