Alone in the dead of night, deep in the Costa Rican rainforest, Bence Máté could focus on nothing but the scuttling of the leaf-cutter ants through the undergrowth. Silently, he watched the giant-jawed insects hack the greenery into tiny pieces before carrying them away. The ritual is one of the most fascinating of the natural world – and the resultant photograph a deserved winner of the Veolia Environnement Wildlife Photographer of the Year 2010, which opens today at the Natural History Museum.