|Gray slender loris (Loris lydekkerianus)|
É. Geoffroy, 1796
É. Geoffroy, 1758
Slender lorises (Loris) are a genus of loris native to India and Sri Lanka. Lorises, also referred to as "Kutti thevangu" in Tamil and "Unahapuluwa" in Sri Lanka, are found in tropical rainforests, scrub forest, semi deciduous forest and swamps. The slender loris is an arboreal animal and spends most of its life in trees. They travel along the top of branches. Their movements are slow and precise. The species have lifespans of 15 years and are nocturnal. Slender lorises generally feed on insects, reptiles, shoots of plants and fruits.
There are two known species:
The slender loris is about the size of a chipmunk, with long, pencil-thin arms and legs. It is between 6-10 in. (15–25 cm) long and has a small, vestigial tail. It weighs about 10.5-12 oz. (275-348g). The slender loris' round head is dominated by two large, closely set, saucer-like brown eyes. They flank a long nose which ends in a heart-shaped knob. The eyes are surrounded by dark-brown to black circles of fur, while the bridge of the nose is white. It has a small, narrow lower jaw. The ears are large and round. Its coat is light red-brown or gray-brown on its back and dirty white on its chest and belly. The fur on its forearms, hands and feet is short. The slender loris has small finger nails on its digits. The second digit on the hand and foot are very short. They move on the same plane as the thumb, which helps them grasp branches and twigs.
For the most part they hunt by themselves or in pairs at night, although they will come together and share a food supply. They live alone or with a mate and an infant. They will sleep with up to seven other lorises in a hollow tree or sitting up in the angles of branches. They are very social at dusk and dawn, playing, wrestling and grooming each other.
Mating occurs twice a year; in April–May and October–November. Gestation is 166–169 days, after which one, and occasionally two infants are born. During the first few weeks mothers carry their infants constantly. The infant will grasp its mother around the waist with both its front and hind legs. After a few weeks the mother "parks" the infant on a branch at night while she forages. The babies move around carefully at first but by two months they are maneuvering around quite well. More mature lorises who sleep in the same tree may visit them at night to play and eat with them. Females will reach sexual maturity in 10 months and 18 months for males. The slender loris has a life span of 12 to 15 years.
The slender loris is for the most part insectivorous. They will also eat slugs, young leaves, flowers, shoots, and occasionally eggs and nestlings. They can stretch and twist their long arms and legs through the branches without alerting their prey. The slender loris eats a lot of noxious and bad smelling insects. They particularly like the acacia ant whose bite can numb a human arm. They also like toxic beetles and roaches. The slender loris will engage in urine washing, or rubbing urine over their hands, feet and face. This is thought to soothe or defend against the sting of these toxic insects.
It is not clear how many slender lorises survive in the wild. Because of their small size and nocturnal habits, it has been difficult to do an accurate count. Until recently not much attention has been paid to the plight of the slender loris, but new interest has been shown in their species and studies are under way. The Indian government has laws protecting the slender loris, but their effect is difficult to gauge.
According to biologists, poaching activity has led to the steady decline of the species in Tamil Nadu. Native people have always believed that all parts of the slender loris have some medicinal or magical powers. This has contributed greatly to the decline of the slender loris. In addition, slender lorises are illegally smuggled to supply a growing exotic pet trade. Along the western region of Tamil Nadu, there is a vigorous clampdown on illegal poaching of slender lorises.
Destruction of tropical rain forest habitat is also contributing to declines in population.
- Groves, C. P. (2005). Wilson, D. E.; Reeder, D. M, eds. Mammal Species of the World (3rd ed.). Baltimore: Johns Hopkins University Press. p. 122. OCLC 62265494. ISBN 0-801-88221-4.
- Loris and potto subspecies - data reviews
- "Men arrested hiding loris in underwear at Delhi airport". BBC News. 10 September 2012.
- "Saving the Loris". Retrieved 21 May 2013.
- "Slender loris". April 2012. Retrieved 2012-11-29.