Snakes are legless.
I detest snakes ,they are footless reptiles
Snakes need warmth to be active.
Sure!They are ectothermic, amniote vertebrate with overlapping scales 
Not all snakes are venomous.
List of dangerous snakes
The varieties of snakes that most often cause serious snakebites depend on the region of the world. In Africa, the most dangerous species include black mambas, puff adders, and carpet vipers. In the Middle East the species of greatest concern are carpet vipers and elapids; in Central and South America, "Bothrops" (including the terciopelo or fer-de-lance) and "Crotalus" (rattlesnakes) are of greatest concern. In South Asia, it has historically been believed that Indian cobras
Snake
Snakes are elongated, legless, carnivorous reptiles of the suborder Serpentes. Like all other 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