Claudio Contreras / Keel billed toucan (Ramphastos sulfuratus), captive.

Claudio Contreras / California condor (Gymnogyps californianus) preening, IUCN Critically Endangered, captive.

Claudio Contreras / California condor (Gymnogyps californianus), IUCN Critically Endangered, captive.

Claudio Contreras / California condor (Gymnogyps californianus), IUCN Critically Endangered, captive.

Claudio Contreras / Osprey (Pandion haliaetus) with fish catch, Cabo Pulmo National Park, Sea of Cortez (Gulf of California), Mexico, July

Juan Carlos Munoz,Juan Carlos Munoz / Black throated diver (Gavia arctica) displaying, Norway, June.

Markus Varesvuo / Male Capercaillie (Tetrao urogallus) flying in woodland, Vaala, Finland, April.

Markus Varesvuo / Male Capercaillie (Tetrao urogallus) flying in woodland, Vaala, Finland, April.

Jan Hamrsky,Jan Hamrsky / Darner dragonfly nymph (Aeshnidae) portrait, Europe, July, controlled conditions

Tui De Roy / Stewart Island Brown Kiwi or Southern Tokoeka (Apteryx australis lawryi), female probing by scent for sand hoppers in rotting kelp beach wrack at night, Ocean Beach, Stewart Island, New Zealand

Tui De Roy / Okarito Brown Kiwi (Apteryx rowi) feather detail resembling mammalian hair. Okarito Forest, Westland, South Island, New Zealand.

Mark MacEwen / Broad snouted caiman (Caiman latirostris) baby carried in mother's mouth from the nest, Sante Fe, Argentina, February