Philippine tarsier (Carlito syrichta), Philippine Tarsier Foundation, Inc., Corelia, Bohol, 2013. My students visit PTFI during my overseas field course and the typical reaction upon seeing one of the world’s smallest primates is always priceless. These nocturnal animals seem lethargic during the day when we see them, and may appear cute and cuddly, but they are ferocious little predators on insects, with an amazingly fast reaction time as they grab their prey.