page_title: Colugo
section_title: Characteristics
hierarchical_section_title: Colugo / Characteristics
caption_attribution_description: English: Feet of Philippine Colugo, or Flying-Lemur (Galeopithecus philippinensis)
context_page_description: Colugos are arboreal gliding mammals found in Southeast Asia, whose closest non-colugo relatives are primates. Just two extant species make up the entire family Cynocephalidae and order Dermoptera. They are the most capable gliders of all gliding mammals, using flaps of extra skin between their legs to glide from higher to lower locations. They are also known as cobegos or flying lemurs, but they are not true lemurs, simply close relatives to primates.
context_section_description: Colugos are tree-dwelling mammals. They reach lengths of 35 to 40 cm (14 to 16 in) and weigh 1 to 2 kg (2.2 to 4.4 lb). They have long, slender front and rear limbs, a medium-length tail, and a relatively light build. The head is small, with large, front-focused eyes for excellent binocular vision, and small rounded ears.
  Colugos are proficient gliders, and they can travel as far as 70 m (230 ft) from one tree to another without losing much altitude, with a Malayan colugo (Galeopterus variegatus) individual having travelled about 150 m (490 ft) in one glide. 
  Of all the gliding mammals,  colugos have the most perfected adaptation for flight. They have a large membrane of skin that extends between their paired limbs and gives them the ability to glide significant distances between trees. This gliding membrane, or patagium, runs from the shoulder blades to the fore paws, from the tip of the rear-most fingers to the tip of the toes, and from the hind legs to the tip of the tail. The spaces between the colugo's fingers and toes are webbed. As a result, colugos were once considered to be close relatives of bats. Today, on account of genetic data, they are considered to be more closely related to primates.
  Colugos are unskilled climbers; they lack opposable thumbs and are not especially strong. They progress up trees in a series of slow hops, gripping onto the bark with their small, sharp claws. They spend most of the day curled up in tree hollows or hanging inconspicuously under branches. At night, colugos spend most of their time up in the trees foraging, with gliding being used to either find another foraging tree or to find possible mates and protect territory.
  Colugos are shy, nocturnal, solitary animals found in the tropical forests of Southeast Asia. Consequently, very little is known about their behavior. They are herbivorous and eat leaves, shoots, flowers, sap, and fruit. They have well-developed stomachs and long intestines capable of extracting nutrients from leaves and other fibrous material.
  The incisor teeth of colugos are highly distinctive; they are comb-like in shape with up to 20 tines on each tooth. The incisors are analogous in appearance and function to the incisor suite in strepsirrhines, which is used for grooming. The second upper incisors have two roots, another unique feature among mammals. The dental formula of colugos is: 
  Although they are placental mammals, colugos raise their young in a manner similar to marsupials. Newborn colugos are underdeveloped and weigh only 35 g (1.2 oz). They spend the first six months of life clinging to their mother's belly. The mother colugo curls her tail and folds her patagium into a warm, secure, quasipouch to protect and transport her young. The young do not reach maturity until they are two to three years old. In captivity, they live up to 15 years, but their lifespan in the wild is unknown.
caption: Feet of Philippine Colugo (Galeopithecus)
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