Oscar Dewhurst / Mute swan (Cygnus olor), two cygnets sheltering under parent's wing. Richmond Park, London, England, UK. April.

Jen Guyton / Park ranger holding a Temminck's ground pangolin (Smutsia temminckii), after rescuing it from poachers. This individual was later released back into the wild. Gorongosa National Park, Mozambique.

Mary McDonald / Adult Mountain gorilla (Gorilla beringei beringei) holding baby, Hirwa group, Volcanoes National Park, Rwanda

Robin Chittenden / Tufted grey langur (Semnopithecus priam priam) baby, Sri Lanka.

Stefan Christmann / Emperor penguin (Aptenodytes forsteri) adult brooding chick with two additional chicks seeking protection while parents are at sea. Atka Bay, Antarctica. September.

David Fleetham / Clark's anemonefish (Amphiprion clarkii), pair tending to egg mass placed beside the protection of an anemone. Yap, Micronesia.

Emanuele Biggi / Peruvian Tarantula (Pamphobeteus sp.) and Humming Frog (Chiasmocleis royi) together, Los Amigos Biological Station, Madre de Dios, Amazonia, Peru. These species have a commensal relationship. The tara...

Emanuele Biggi / Peruvian Tarantula (Pamphobeteus sp.) adult, walking over Humming Frog (Chiasmocleis royi) without preying on it. Los Amigos Biological Station, Madre de Dios, Amazonia, Peru. These species have a com...

Lucas Bustamante / Coastal glassfrog (Cochranella litoralis) on leaf with eggs. San Lorenzo, Esmeraldas, Ecuador.

Claudio Contreras / Caribbean Flamingo (Phoenicopterus ruber) chick under the wing of protective parent, breeding colony, Ria Lagartos Biosphere Reserve, Yucatan Peninsula, Mexico, June.Finalist in the Portfolio Category...

Franco Banfi / Mother with young calf Sperm whale (Physeter macrocephalus) Dominica, Caribbean Sea, Atlantic Ocean.

Tony Wu / Polar bear (Ursus maritimus) female with a single young cub, only a few months old, northern Svalbard, Norway, June