Lucas Bustamante / Giant river otter (Pteronura brasiliensis) eating a catfish. Yasuni National Park, Orellana, Ecuador

Lucas Bustamante / Anhinga (Anhinga anhinga). Yasuni National Park, Orellana, Ecuador

Lucas Bustamante / Jaguar (Panthera onca) standing in mud, Yasuni National Park, Orellana, Ecuador

Lucas Bustamante / Zigzag Heron (Zebrilus undulatus) camouflaged in branches while nesting. Yasuni National Park, Ecuador

Lucas Bustamante / Scarlet Macaws (Ara macao) drinking water inside an Amazonian claylick. Yasuni National Park, Orellana, Ecuador

Chien Lee / Amazon Horned Frog (Ceratophrys cornuta), Yasuni National Park, Ecuador

Chien Lee / Amazon Horned Frog (Ceratophrys cornuta) camouflaged in leaf litter, Yasuni National Park, Ecuador

Chien Lee / Amazon Horned Frog (Ceratophrys cornuta), Yasuni National Park, Ecuador

Lucas Bustamante / Brush footed butterfly (Lycorea sp.) caterpillar with parasitic wasp cocoons on silk threads, Yasuni National Park, Orellana, Ecuador.

Paul Bertner / Leafcutter Ant (Atta sp) group harvesting leaf, Yasuni National Park, Ecuador

Pete Oxford / Big-legged Bug or Squash Bug (Coreidae) on Heliconia Flower. Yasuni National Park, Amazon Rainforest, Ecuador. South America

Pete Oxford / Leaf Katydid (Cycloptera speculata) camouflaged on leaf, Yasuni National Park, Amazon Rainforest, Ecuador, South America.