The Spectral Tarsier (Tarsius spectrum) is a member of the Tarsier family and living on the island of Sulawesi, Indonesia, and is also reffered to as 'Sulawesi Tarsier'. It is about 25 centimeters long and weighs 94-154 grams. They sleep in hollow trees, palm trees, or thick vines. Spectral Tarsiers are not very social animals, they encounter each other only once in a while during the night when they feed on insects. During the day they sleep most of the time and socially interact only a short time of the day.