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

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

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

Tim Laman / Aerial view of morning mist above the Tiputini River in Yasuni National Park, Francisco de Orellana Province, Ecuador, July.

Alex Mustard / Scalloped hammerhead shark (Sphyrna lewini) swims through a school of Pacific creolefish (Paranthias colonus). Wolf Island, Galapagos National Park, Galapagos Islands.. East Pacific Ocean.

Alex Mustard / Bottlenose dolphin (Tursiops truncatus) pod of four, swimming in the open ocean. Wolf Island, Galapagos National Park, Galapagos Islands.. East Pacific Ocean.

Lucas Bustamante / Many-banded aracari (Pteroglossus pluricinctus) Yasuni National Park, Orellana, Ecuador

Lucas Bustamante / White-bellied spider monkey (Ateles belzebuth) Yasuni National Park, Orellana, Ecuador.