The pygmy tarsier (tarsius pumilus) last spotted in 1920, was thought to be extinct, until recently when a team of researchers captured three (two males + one female) in an Indonesian cloud forest on Mount Rore Katimo in Lore-Lindu National Park. They attached radio collars to their necks in order to track their movements and released them.
These little nocturnal creatures weigh less than 60 grams and have dense fur that keeps them warm in their cold habitat at high altitudes. Its eyes cannot move, so when hunting for small insects or vertebrates it turns its head 180 degrees. Unlike other primates it has claws, rather than nails.