Its keeled sternum, which is also seen in bats, aids in its gliding efficiency.[4] Its patagium is the most extensive membrane used for gliding in mammals and also functions as a hammock-like pouch for its young. This membrane helps it glide distances of 100 m or more, useful for finding food and escaping predators, such as the Philippine eagle (Pithecophaga jefferyi) and tree-climbing snakes that try to attack the colugos when they glide between trees.[7][8] The dental formula of Philippine flying lemur is 2/3, 1/1, 2/2, 3/3, with a total of 34 teeth. The first two lower procumbent incisors are pectinate with up to 15 tines, which are thought to be used for grooming and grating food.[4] The upper incisors are small and have spaces between them, as well.[4] The deciduous teeth are serrated until they are lost and then they are replaced with blade-like teeth that have evolved to shear along with the molars that also have long shearing crests to help break down the plant matter they ingest.[9] Following mastication, the digestive tract of the Philippine flying lemur, especially the stomach, is specially adapted to break down and process the large amount of leaves and vegetation they ingest.[6] Colugos also have a brownish grey-and-white pelage they use as camouflage amongst the tree trunks and branches, which allows them to better hide from predators and hunters.[4]