"The world's smallest monkey" is usually heard slogan. However, it is not a monkey. In truth, its classification is somewhat problematic. Some scientists consider tarsiers to be a taxonomic suborder among the primates. While, because they are closely related to lemurs, lorises and bushbabies, others classify them with the prosimians to which these animals belong. Monkeys and apes belong to the suborder of anthropoids.
The Philippine tarsier, (Tarsius syrichta) is very peculiar small animal. In fact it is one of the smallest known primates, no larger than a adult men's hand.
They are more active at night, it lives on a diet of insects. Folk traditions sometimes has it that tarsiers eat charcoal, but actually they retrieve the insects from (sometimes burned) wood.
It can be found mostly in the islands of Bohol in the Visayas, and Mindanao (particularly in Tupi, South Cotabato) in the Philippines.
The complete taxonomic classification thus is:
| Class | Mammalia |
| Order | Primates |
| Suborder | Prosimii/Haplorrhini |
| Infraorder | Tarsiiformes |
| Superfamily | Tarsioidea |
General. The Philippine tarsier has a gray fur and a nearly naked tail. The middle finger is elongated. Head and body length are around 118-149 mm; It weighs 113-142 grams. Males are larger than females.
Currently, the Philippine tarsier is categorized as a "lower risk, conservation dependent" species, which means that, although it is not yet categorized as vulnerable, endangered, or critically endangered, it could qualify for one of those categories within five years if the present protection programs are stopped.
Tarsiers are arboreal. They live in and around the base of tree trunks and the roots of plants such as bamboo. They can occasionally be found in holes are at the top of trees. In Mindanao, tarsiers appear to thrive best in second or third growth thickets along the coast and in the valleys.
The tarsier produces a a number of different calls. The loud call is a loud piercing single note. When opponents meet, they produce a soft sweet bird-like trill. When several individuals communicate, they can produce a locust-like chirping. Females have a specials sound to indicate that they are fertile.
Tarsiers live exclusively on animal prey. Their diet includes primarily insects such as cockroaches and crickets, but may occasionally be extended with reptiles, birds, and bats. A Philippine tarsier in captivity will eat live shrimp and fish in a bowl of water.
Tarsiers share some characteristics with both the prosimians and the anthropoids, while they also have some characteristics peculiar to themselves. Taxonomists have classified them as intermediate between both groups and have assigned them to their own infraorder, which contains just one living genus: Tarsius. Fossil records of this genus are found, dating back to the Eocene epoch, from 54 to 36 million years ago.
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