• Fossa young can jump from branch to branch at 3.5 months. At 2 months old, they already climb branches.

Fossas typically live for fifteen to twenty years, with a maximum lifespan of twenty-three years and one month, and a theoretical lifespan ranging from eleven years and seven months to twenty-three years and one month. The species reaches sexual maturity at four to four years and two months of age. The embryo develops inside the mother’s body, followed by the infant stage, where the young are born blind and helpless, live in a shelter with their mother, and feed on milk. An adult fossa is a fully grown animal that hunts independently and can reproduce, and this stage lasts from two to twenty years.