The Anchorwhip (Flagellanguis viridis) is a venomous rainforest tree snake that uses an anchor-like tail to snatch birds and small mammals.

Among the tree-living reptiles of the African rain forest is perhaps the most specialized - an extremely long and thin tree snake. Its broad, grasping tail, the most muscular part of its body, is used to anchor it to a tree while it lies coiled and camouflaged among the leaves of the tallest crowns in wait for an unwary passing bird. The snake is capable of darting out three metres, equivalent to about four-fifths of its body length, and seizing its prey while still retaining a tight hold on the branch with its tail.