Slow Lorises

Bornean Slow Loris (Nycticebus menagensis) Photo courtesy of the Danau Girang Field Centre

Slow lorises are primates from the genus Nycticebus. All five species of slow lorises live in Southern and Southeast Asia.  The various species are scattered across a swath of territory running from southern India down across Southern China across the Malay Peninsula and throughout Indonesia. All of the slow lorises are nocturnal and arboreal.  Their large eyes help them see at night and their sense of smell is unusually acute.  The primates are omnivorous and consume insects, fruit, and plant matter.  Their metabolism is very low and their movements are slow and methodical.

Slow lorises are strepsirrhine primates: they have traits which biologists consider to be “ancestral” for primates such as rhinariums (i.e. “wet” noses such as dogs, cats, and bunnies have), multiple sets of nipples, and the ability to enzymatically manufacture ascorbic acid.

Illustration of a Slow Loris’ Brachial Gland

Slow lorises also have glands on their elbows called brachial glands which produce a strong smelling secretion.  They anoint themselves with this substance and groom it through their fur using their tooth combs (which consist of needle-like teeth on the lower jaw used for grooming).  Some zoological literature contends that slow lorises are poisonous and that the combination of their saliva and the secretion from their brachial glands is toxic to humans, however this is not exactly correct.  Humans are allergic to slow loris secretions and sometimes go into anaphylactic shock when bitten, yet the secretions are not toxic per se.

Slow Loris (from Cute Overload)

In the wild slow lorises are preyed on by large snakes, hawk-eagles, and orangutans (who are evidently not quite as vegetarian as they are made out to be).  Predictably, the hugely expanding human population of Southeast Asia constitutes the most serious threat to the various species of slow loris.  Many of the little creatures are captured for the pet trade.  Since slow loris bites are painful, hunters cut out captured animals’ teeth—an operation which is frequently fatal and, if successful, leaves them  defenseless and lacking their principle means of cleaning themselves and interacting with other lorises (since grooming is a part of bonding).

Not only are slow lorises threatened by the pet trade.  Local superstition attributes magical protection powers to the slow loris, an so their bodies are burned or cut up for various spells, potions, and nostrums (evidently the protective magic does nothing for the slow lorises themselves). David Adam, detailed some of the consequences of magical myths about lorises in an article written for The Guardian:

As a result [of superstition], the luckless lorises frequently find themselves roasted alive over wood fires while eager people catch the supposedly life-giving liquor that drips out. Bits of their bodies are used in traditional medicine. And legend has it that villagers anxious about traffic safety need only bury a loris beneath a new road to keep it free from accidents.

As stupid and malicious as human reasons for hunting slow lorises are, the most serious threat to the animals comes from deforestation and habitat destruction.  Hopefully the rampant destruction of Southeast Asia’s rainforests will halt in time to save our big eyed cousins.

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