These worms are almost impossible to see in the trees they live in. When young, they look like twigs, when grown, like branches - bark, leaves and all. They wait for prey to pass below them or to climb in the tree. Then they strike, coiling around their victim like a leafy constrictor snake. If they change to a different species of tree, it takes a few days for their camouflage to adapt. Instinct: Smother and strangle

• Drop from a tree on its unsuspecting victim, and strangle or constrict it
• Climb on a tree and lie in wait