[4] "Tarsiers were once thought to be of the Strepsirrhini suborder, grouped with Lemuroidea and Lorisidae because of their similar appearance and because they have a small stature and are also nocturnal.

"[5] According to Gursky et al. 2003, based on phylogenic research, tarsiers are more closely related to monkeys and apes than lemurs and lorises.

"[5] In a study done by John and Kathy MacKinnon, it was found that tarsiers have a completely carnivorous diet, which is unique in primates.

Although some species will prey on small birds and rodents, their diet consists mainly of insects that they capture on the ground, tree branches and leaves, and in the air (Mackinnon et al., 1980).

They travel between trees and socialize, which usually includes grooming one another, scent marking, playing and vocalizing (Gursky et al.

A study done by Sharon Gursky in 1998 defines group size as the number of individuals sharing a sleeping site.

The study was done in the Tangkoko Dua Saudara Nature Reserve and Gursky et al. found that 14% of groups contained more than 1 adult female.

[5] In a study done in North Sulawesi, Indonesia in 2007, the Mackinnons found that the spectral tarsiers were monogamous and territorial.

Gursky et al. found that the two subadults in the group were more regularly caring for the infant than the adult males, females or mothers were.

Chirps, twitters, and choruses extended from the audible to the ultrasonic range, the doubles and whistles were pure ultrasound.

Gursky describes mobbing as all the individuals in an area responding to a threat with vocalizations and then each animal repeatedly lunging towards then retreating from the predator.

[17] According to the study done by the Mackinnons, tarsiers scent mark their ranges by rubbing branches with urine and special epigastric glands.

[9] It was found that the primary predators of the tarsiers are monitor lizards, civets, snakes, and a variety of birds of prey.