Snakes are elongated, legless, carnivorous reptiles of the suborder Serpentes[2] that can be distinguished from legless lizards by their lack of eyelids and external ear drums. Like all squamates, snakes are ectothermic, amniote vertebrates covered in overlapping scales. Many species of snakes have skulls with several more joints than their lizard ancestors, enabling them to swallow prey much bigger than their heads with their highly mobile jaws. To their narrow bodies, snakes’ paired organs (such as kidneys) appear one in the of the other as an alternative to side by side, fairly have only one functional lung. Some species retain a pelvic girdle with a pair of vestigial claws on either side with the cloaca. Living snakes you find on every continent except Antarctica, and on most smaller land masses; exceptions include some large islands, such as Ireland, Iceland, Greenland, the Hawaiian archipelago, and the islands of brand new Zealand, and many small islands of the Atlantic and central Pacific marine environments. Additionally, sea snakes are widespread throughout the Indian and Pacific Oceans. More than 20 families are currently recognized, comprising about 500 genera and about 3,400 species.They range in size from the tiny, 10.4 cm (4.1 in)-long thread snake[6] to the reticulated python of 6.95 meters (22.8
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