All tarsiers are predominantly arboreal and are considerably adapted to more or less vertical supports.

Western tarsiers strongly prefer vertical supports of 0.4-1.6 in (1-4 cm) in diameter. Leaping between vertical tree trunks, they use only a very thin layer of the space of their habitat, foraging more than 80% of the time below 3 ft (1 m) above the ground. Soil contacts make up roughly 5% of all leaps, but they consume only about 1% of the time budget. Sleeping sites of the western tarsier (for single individuals) are often found between 6.6 and 16.4 ft (2-5 m) above the ground.

A spectral tarsier (Tarsius spectrum) family in the rainforest of Sulawesi, Indonesia. (Photo by Michael Fogden. Bruce Coleman, Inc. Reproduced by permission.)
The western tarsier (Tarsius bancanus) uses its extremly large eyes to help it see during the night. (Photo by Art Wolfe/Photo Researchers, Inc. Reproduced by permission.)

Spectral tarsiers (T. spectrum) sleep in small groups, often in hollow trees or densely growing vines, mostly between 3 ft (1 m) and roughly 60 ft (20 m) above the ground.

Also, some tarsiers may venture into other neighboring habitats like mangrove areas, grassland, or diverse forms of plantations, provided that both suitable supports for clinging and leaping are present and prey animals are found in sufficient numbers. Habitat choice above the ground between vertical supports must be a very efficient mechanism for predator avoidance, as tarsiers produce very few offspring.

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