The largest snake in the world is the green anaconda. This snake can grow up to 29 feet long and 12 inches in diameter, weighing more than 550 pounds. Although the reticulated python can reach slightly greater lengths, the massive girth of the green anaconda makes it twice as heavy.
This enormous snake is native to South America and is considered the largest snake in the world. Female green anacondas are considerably larger than male green anacondas. This snake is a member of the boa family and lives in tropical rainforests. Green anacondas are found in the marshes and swamps of the Orinoco basins and the Amazon. These snakes owe much of their massive size to a diet of deer, wild pigs, birds, turtles and jaguars.