SINCLAIR STAMMERS / SCIENCE PHOTO LIBRARY SINCLAIR STAMMERS / SCIENCE PHOTO LIBRARY
Boa constrictor snake (Boa constrictor) coiled and resting in a tree trunk. A boa constrictor seizes its prey with its sharp, backward-pointing teeth. The prey is killed by constriction and swallowed whole. This snake is found all over tropical South America. It is a ground dweller and is prevalent in mountain forests. Usually 3-4 metres in length, it will weigh about 60 kilograms.
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