The biological riches of Ecuador's Yasuní national park

Morning fog over the Yasuní national park's rainforest canopy Photograph: Theo Allofs/Corbis A young Waorani prepares to use his blowpipe in the Yasuní national park Photograph: Dolores Ochoa/AP A butterfly perches on a leaf Photograph: Dolores Ochoa/AP A toucan Photograph: Alejandra Parra/Getty A monkey sitting on a branch Photograph: Lars-Olof Johansson/Corbis Moss growing on tree trunks Photograph: Lars-Olof Johansson/Johnér Images A bush cricket Photograph: Peter OxfordNPL/Rex Features Butterflies in the Yasuní national park Photograph: Lars-Olof Johansson/Corbis Leaf frogs Photograph: Pete Oxford/NPL/Rex Features Spider on a tree Photograph: Lars-Olof Johansson/Corbis A wire-tailed manakin Photograph: Peter OxfordNPL/Rex Features Buttress roots of a ficus tree Photograph: Peter Oxford / Nature Picture Li/Rex Features An alligator at night in the Yasuní national park Photograph: Eduardo Leon/Corbis Parrots perching on a branch Photograph: Lars-Olof Johansson/Corbis The Tiputini river on the north border of the national park Photograph: CECILIA PUEBLA/EPA Children swimming near oil pipelines in Orellana province, Ecuador, near to the Yasuní national park Photograph: Eduardo Leon/Corbis A waterhole contaminated by an oil leak near the Yasuní national park Photograph: Alejandra Parra/Getty