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This article is about the animal. For other uses, see Snake (disambiguation). Snakes Temporal range: Early Cretaceous – Holocene, 112–0Ma PreЄЄOSDCPTJKPgN Thamnophis elegans, a species from western North America Scientific classification Kingdom: Animalia Phylum: Chordata Class: Reptilia Order: Squamata Clade: Ophidia Suborder: Serpentes Linnaeus, 1758 Infraorders Alethinophidia Nopcsa, 1923 Scolecophidia Cope, 1864 Approximate world distribution of snakes, all species Snakes are elongated, legless, carnivorous reptiles of the suborder Serpentes that can be distinguished from legless lizards by their lack of eyelids and external ears. 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 larger than their heads with their highly mobile jaws. To accommodate their narrow bodies, snakes' paired organs (such as kidneys) appear one in front of the other instead of side by side, and most have only one functional lung. Some species retain a pelvic girdle with a pair of vestigial claws on either side of the cloaca.. Mam nadzieje ze pomoglam. Mozesz kilka zdan ominac , bo troche tego za duzo... Pozdrawiam!!