Snakes are prolonged, legless, savage reptiles of the suborder Serpentes that can be recognized from legless reptiles by their absence of eyelids and outer ears. Like all squamates, snakes are ectothermic, amniote vertebrates canvassed in covering scales. Numerous types of snakes have skulls with a few a greater number of joints than their reptile precursors, empowering them to swallow prey significantly bigger than their heads with their exceptionally portable jaws. To suit their limited bodies, snakes' matched organs, (for example, kidneys) seem one before the other rather than one next to the other, and most have just a single practical lung. A few animal groups hold a pelvic support with a couple of minimal hooks on either side of the cloaca. Living snakes are found on each mainland aside from Antarctica, and on most littler land masses; special cases incorporate some substantial islands, for example, Ireland, Iceland, Greenland, the Hawaiian archipelago, and the islands of New Zealand, and numerous little islands of the Atlantic and focal Pacific seas. Furthermore, ocean snakes are boundless all through the Indian and Pacific Oceans. More than 20 families are as of now perceived, involving around 500 genera and around 3,400 species.They extend in size from the minor, 10.4 cm (4.1 in)- long string snake[6] to the reticulated python of 6.95 meters (22.8 ft) long.
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