A tarsier weighs about as much as a small apple - around 120 grams. From head to tail it is roughly the length of a pencil. Its tail is longer than its body, used for balance when it leaps from tree to tree.
Its eyes are the most surprising thing about it. Each eye is bigger than its own brain. Tarsiers can't move their eyes around in their sockets like we can, so to look in different directions they rotate their whole head - almost all the way round, like an owl.
Tarsiers are night animals. They sleep during the day, curled up against a tree trunk, and come out at dusk to hunt for crickets, beetles and grasshoppers. Their huge eyes soak up moonlight, helping them see in the dark.
Tarsiers live only on a few Philippine islands - mainly Bohol, Samar and Leyte. Today there are special protected forests where they are safe and tourists can visit quietly to see them. The rule is simple: no flash photos, no loud noises, and definitely no touching. Tarsiers are easily upset, so the people who look after them ask everyone to be calm and gentle.