series of slow hops, gripping onto the bark with their small, sharp claws. They spend most of the day resting. 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. Behavior and diet 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. Colugos have evolved into a nocturnal species, along with the ability to proficiently see during the nighttime. Lifecycle Although they are placental mammals, colugos raise their young in a manner similar to marsupials. Newborn colugos are underdeveloped and weigh only . 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. Status Both species are threatened by habitat destruction, and the Philippine flying lemur was once classified by the IUCN as vulnerable. In 1996, the IUCN declared the species vulnerable owing to destruction of lowland forests and hunting. It was downlisted to least-concern status in 2008 but still faces the same threats. In addition to the ongoing clearing of its rainforest habitat, it is hunted for its meat and fur. It is also a favorite prey item for the gravely endangered Philippine eagle; some studies suggest colugos account for 90% of the eagle's diet. Classification and evolution Order Dermoptera †Family Plagiomenidae? †Planetetherium †Planetetherium mirabile †Plagiomene †Plagiomene multicuspis †Family Mixodectidae? †Dracontolestes †Dracontolestes aphantus †Eudaemonema †Eudaemonema cuspidata †Mixodectes †Mixodectes pungens †Mixodectes malaris Family Cynocephalidae Cynocephalus Philippine flying lemur, Cynocephalus volans Galeopterus Sunda flying lemur, Galeopterus variegatus †Dermotherium †Dermotherium major †Dermotherium chimaera The Mixodectidae and Plagiomenidae appear to be fossil Dermoptera. Although other Paleogene mammals have been interpreted as related to dermopterans, the evidence for this association is uncertain and many of the fossils are no longer interpreted as being gliding mammals. At present, the fossil record of definitive dermopterans is limited to two species