Some species of tree snakes can drift through the air, moving their bodies as they fly from tree to tree.  Now scientists from Johns Hopkins University Applied Physics Laboratory have claimed that they have evolved this unusual ability to glide over the years. Scientists have constructed the first continuous, anatomically accurate 3D mathematical model of the paradise tree snake in flight. Scientists had earlier found that the tree snakes flatten their bodies as they leap, creating lift. The new experiment reveals that the snakes also use a complex combination of movements as they fly.