The fossa (Cryptoprocta ferox) is a carnivorous mammal that is endemic to the island of Madagascar. It is a member of the Eupleridae, a family of carnivorans closely related to the mongoose family Herpestidae. They look like a cross between a dog, a cat, and a mongoose. Here are 10 amazing fossa facts.

1. Its scientific name means “hidden anus”

The fossa’s genus name, Cryptoprocta, comes from the fact that its anus is concealed by the anal sacs (small glands near the anus in many mammals, including dogs and cats). It is a Greek term that combines the words secret (crypto) and anus (procta).

The fossa’s species name, ferox, alludes to the animal’s overblown reputation for violence.

2. They are usually twice the average housecat size

The male fossa is slightly larger than the female. They can reach a length of about 28-31 in (70-80 cm). Their tails can be almost a meter long.

Their weight is in females, 12 to 15 pounds (5.5 to 6.8 kilograms); in males, 13 to 19 pounds (6.2 to 8.6 kilograms).

3. Fossas communicate using sounds, smells, and visual signals

Vocalizations can include muttering, a threatening call, and a decoy call consisting of “repeated loud, rough inhalations and gasps for breath”.

Throughout the year, animals use the glands in the anal region and chest to leave long-term remnants of odors on rocks, trees, and the ground.

They also communicate using facial and body expressions, but the significance of these signals is unclear.

4. They are Madagascar’s biggest predators

The fossa, an extreme predator of Madagascar, hunts both during the day and at night and is able to catch prey both on the ground and in the tree.

Lemurs make up the bulk of their diet, but it also eats small mammals, fish, lizards, birds, frogs, and insects.

Fossa (Cryptoprocta ferox)
The fossa (Cryptoprocta ferox) has a cat-like appearance, resembling a small cougar (Puma concolor). But it’s not a felid. Photo by Ran Kirlian – Own work, CC BY-SA 4.0, Link

5. They have an interesting way of mating

The female stands at the top of a tree, and the males, competing for the right to mate, gather under it.

They can choose to mate with several candidates, but each mating lasts several hours.

This long mating is due to the backward-facing spines on the male’s penis, which causes a mating bond that is difficult to break.

The same trees are often used every year. The fact that a female chooses her mates by monopolizing a mating dec is unique among carnivores.

6. Cubs are born blind and toothless

They usually give birth to 2-6 cubs. Babies are weaned after 4.5 months and are independent after a year.

Sexual maturity occurs around the age of three to four years, and life expectancy in captivity is 20 years.

7. They are fast

The fossa is a speedy runner. A Fossa can travel at speeds of up to 35 miles per hour.

8. Female fossas can change their gender temporarily

The female fossa is having a strange stage of development specific to the fossa, known as temporary masculinization during puberty.

It develops an enlarged, pointed sweet spot resembling a male’s genital organ and secretes an orange substance towards the bottom of its abdomen, which is typical only for mature males, meaning that the adult female lacks this feature.

It is not known what purpose this temporary masculinization serves, but according to one theory, it is assumed that this behavior protects young females from harassment by an adult male or aggression by territorial females.

9. They are skilled climbers

Their long, slender tail helps in balance when navigating between trees, and its semi-retractable paw and flexible ankle allow it to move adequately up and down trees.

They use a human-like movement method known as “plantigrade” to walk flat-footed on her toes like a bear. When bouncing from branch to branch, this function adds added balance and agility.

10. People in Madagascar call them the “devil”

Because of their behavior and appearance, people in Madagascar call fossa the “devil”.

There are many legends about this animal, and one of the most popular is about how they kidnap babies at night. Of course, this is not true.


Ceren Bayraktar
Latest posts by Ceren Bayraktar (see all)

Leave a comment

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.