A green anaconda coiled up on a branch in the Amazon River Basin. These deadly predators can weigh up to 250 kilograms.
Iguanas can grow to be over 6 feet long. But despite their length, they manage to blend in well with their surroundings, like this iguana hiding in the trees.
A Galapagos tortoise can live to be 80 to 120 years old.
The Mojave rattlesnake uses its rattle to alert predators to its presence. It can release about 130 different toxins during a bite.
The alligator snapping turtle can live up to 100 years.
A gharial at water's edge in India. The world's gharial population has decreased nearly 98% since the mid-1900s due to hunting for traditional medicine and changes to its environment.
Despite its devilish appearance, the Saharan horned viper venom is rarely fatal to humans.