Snakes are long and legless carnivorous reptiles of the suborder "Serpentes."
Snakes do not have eyelids and external ears. They are vertebrates covered in over-lapping scales, many with skulls that have several more joints than lizards, allowing them to swallow much larger prey than the size of their heads. As snakes have narrow bodies, their paired organs are lined up one in front of the other instead of side by side.
Snakes live on every continent except Antarctic.
There are about 3,400 known species of snakes. Species vary in size from the tiny thread snake (only 10 cm long) to the giant reticulated python (growing to over 20 feet long).
Most snakes are not venomous, those who are venomous use their venom primarily to kill and subdue prey, not for self-defense. Non-venomous snakes swallow their prey live or kill by constricting the prey.
Snakes are cold blooded, therefore they cannot regulate their body temperatures, they need sunlight to keep warm.
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