Perhaps the largest in the world is the giant anaconda, which lives in tropical South America.  It may grow to be nearly 30 feet long and weigh over 250 pounds.

This giant snake, also called a “water boa,”  lives in swamps and rivers.  It has olive-green skin, often with many black rings or spots.


The anaconda is not poisonous.  It kills small animals for food by constriction.  That is, it squeezes its prey to death by winding its powerful coils tightly around the victim.

It does not have to squeeze hard enough to break the victim’s bones, it squeezes just enough to stop the victim’s breathing.

The anaconda then swallows its prey whole, without chewing.  It can swallow animals much larger than its head because its jaw is hinged so it can be stretched far apart.

The anaconda does not need to eat very often.  It may take several days to digest a large meal. – Dick Rogers