Fossa Unique Animal in Madagascar

The fossa (Cryptoprocta ferox) is a cat-like, carnivorous mammal endemic to Madagascar. It is a member of the Eupleridae, a family of carnivorans closely related to the mongoose family Herpestidae. Its classification has been controversial because its physical traits resemble those of cats, yet other traits suggest a close relationship with viverrids.

The fossa is the largest mammalian carnivore on Madagascar and has been compared to a small cougar. Adults have a head-body length of 70–80 cm and weigh between 5.5 and 8.6 kg), with the males larger than the females. It has semi-retractable claws (meaning it can extend but not retract its claws fully) and flexible ankles that allow it to climb up and down trees head-first, and also support jumping from tree to tree.
The species is widespread, although population densities are usually low. It is found solely in forested habitat, and actively hunts both by day and night. Over 50% of its diet consists of lemurs, the endemic primates found on the island; tenrecs, rodents, lizards, birds, and other animals are also documented as prey. The greatest threat to the fossa is habitat destruction.

Mating usually occurs in trees on horizontal limbs and can last for several hours. A receptive female occupies a site high in a tree, below which males will congregate and compete for mating rights. She may choose to mate with several of her suitors over the next week, and bouts of copulation may last for several hours. This lengthy mating is partly due to the backwards-pointing spines on the male's penis, which results in a copulatory tie that is difficult to break. Once the first female has left, a new female will take over the mating site. The same trees are frequently used year after year. This mating system, in which a female monopolizes a site and chooses her mates, seems to be unique among carnivores.