Fossa is the apex predator of Madagascar, a large carnivorous mammal that is the top of the food chain in the island's unique ecosystem. It is the largest carnivore on the island, and its diet consists mainly of lemurs, small mammals, birds,
From Wikipedia
The fossa is a slender, long-tailed, cat-like mammal that is endemic to Madagascar. It is a member of the carnivoran family Eupleridae.