Tarsius, known for its enormous eyes relative to its body, is a nocturnal primate found in Southeast Asia. With elongated fingers and a head that can rotate nearly 180 degrees, it is an exceptional jumper, adept at catching insects. Tarsiers are solitary and mark territories with scent.

Tarsius, commonly known as tarsiers, are native to Southeast Asia. Their geographical distribution includes countries such as Indonesia, Malaysia, the Philippines, and Brunei. They are predominantly found on islands such as Borneo, Sumatra, and the Philippines' islands.

Tarsiers inhabit tropical rainforests and mangrove forests. These areas are characterized by high humidity, abundant rainfall, and warm temperatures, typically ranging from 20°C to 30°C (68°F to 86°F). The dense canopy and rich biodiversity provide an ideal environment for these nocturnal primates.

Tarsiers are arboreal and primarily insectivorous, occupying a niche as nocturnal predators. They have adaptations such as large eyes for night vision and elongated fingers for gripping branches. Although primarily feeding on insects, tarsiers may also consume small vertebrates. Their role in the ecosystem includes controlling insect populations and serving as prey for larger predators.