There are about 3,400 species of snakes in the world, 600 out of those are venomous.
Largest snake
The green anaconda is one of the largest and heaviest known snake in the world. It can weight upto 500 lb.
Smallest Snake
Barbados threadsnake is the smallest known species of snake.
Most venomous snake
Inland taipan is the most venomous snake in the world. One bite of this snake can kill 100 full grown man.
Flying snake
Chrysopelea is the snake which can fly, well not really. They jump and glide from tree to tree.