An Illustrated Dictionary. They have developed several different modes of locomotion to deal with particular environments. Washington, D. An alternative hypothesis, based on morphologysuggests the ancestors of snakes were related to mosasaurs —extinct aquatic reptiles from the Cretaceous —which in turn are thought to have derived from varanid lizards. Read More Top news stories from Mirror Online. While not commonly thought of as food in most cultures, in some cultures, the consumption of snakes is acceptable, or even considered a delicacy, prized for its alleged pharmaceutical effect of warming the heart.
In regions where winters are colder than snakes can tolerate while remaining active, local species will brumate.
Russian Journal of Herpetology. The Smithsonian Answer Book. So much metabolic energy is involved in a snake's digestion that in the Mexican rattlesnake Crotalus durissussurface body temperature increases by as much as 1. Quarterly Journal of Microscopical Science. Auckland War Memorial Museum.