The Northern Green Anaconda was found by TV wildlife presenter, Professor Freek Vonk, and is as thick as a car tyre. Despite having a head the size of a human's, it seems Professor Vonk ...

2. Green Anaconda: Native to South America, the green anaconda is the heaviest snake, with adults often exceeding 550 pounds (250 kilograms) and measuring up to 30 feet (9 meters) in length.