Philippine TARSIER : 5 Amazing Monkey Facts

Tarsiers look odd. Among the smallest of all primates, most species of tarsier would fit easily in the palm of your hand. They have long, slender, largely hairless tails and elongated fingers with knobby knuckles and mushroom-cap finger pads.
Now, scientists have discovered that the tarsier is even stranger than we realized. Apparently, these tiny primates can send and receive ultrasonic calls, joining a select club of mammals with the same acoustic talent—namely, whales, dolphins, cats, rats and bats. Researchers already knew that tarsiers make at least 15 distinct calls—all of which are audible to people—but until now no one had good evidence that they also communicate with ultrasonic shrieks, although some scientists guessed they might.