Big snakes are a type of reptile that can be found in many parts of the world. Anacondas and boas are two of the largest species of snake, both of which can grow to be over 10 feet long. Anacondas are native to South America and can be found in tropical rainforests, swamps, and rivers. Boas are found in Central and South America, as well as some parts of Africa and Asia. Both anacondas and boas are constrictors, meaning they use their powerful bodies to squeeze their prey before consuming it.