If you're a forest predator, success requires using trees to bridge the gap between life and death. In this realm, danger - or your next meal - could be behind you, below, or above you. Whether you're a Harpy eagle, zeroing in on prey from high in the rainforest canopy, a cunning weasel, scouring for a meal in and out of mossy logs, or a Bengal tiger, trying to stalk in a bare, dry forest, catching prey among the trees is a challenge.