Pythons take the last breath out of their prey

PYTHONS and boas were the first types of snake to evolve on earth more than 70 million years ago.

Nearly 75 kinds are known and they live in many different habitats in the warmer parts of the world.

Pythons and boas include some of the biggest living reptiles. They can grow to lengths of seven metres or more.

Since they have no venom or poison, they rely on speed and strength to catch prey. They lie and wait, often anchoring the rear part of their body to a tree.

When prey comes within range, they strike fast and grip it with their sharp teeth. Then they wrap their body round and round the victim, holding on tight.

When the prey breathes out, the snake tightens its hold even more, stopping the victim from breathing in again.