Animal locomotion many of these same principles may be applied to climbing without trees, such as on rock piles or mountains. The earliest known tetrapod with specializations that adapted it for climbing trees, was "Suminia", a synapsid of the late Permian, about 260 million years ago. Some invertebrate animals are exclusively arboreal in habitat, for example, the tree snail. "Brachiation" (from "brachium", Latin for "arm"), is a form of arboreal locomotion in which primates swing from tree limb to tree limb using only their arms. During brachiation, the body is alternately supported under each forelimb. This is the primary means of locomotion
Animals in Buddhism not expressly commanded in the Pāli canon, it is evidently viewed as an ideal state from which human beings have fallen; the Aggañña Sutta (DN.27) explains how human beings, originally sustained on various kinds of vegetable matter (compare Gen.1:29-30), as the result of increasing wickedness began to live by hunting, which was originally thought of as a demeaning occupation. In East Asian Buddhism and particularly in Tibet and China, the release of animals, particularly birds or fish, into their natural environment became an important way of demonstrating Buddhist pity. In Tibetan Buddhism it is known as "Tsethar"; whilst in China