This amazing image of a cat-eyed tree-snake locked in a deadly embrace with an endangered Morelet's treefrog was taken by David Maitland, and won him the European Wildlife Photographer of the Year title in 2008. The snake had failed to get its jaws around the whole of the frog's head and the duo were stuck in this tug of war for at least three hours, when Maitland gave up and went to bed.

See more of his work: http://bit.ly/8bKw3L, image via Milky way scientists