Tui De Roy / Olive Ridley Sea Turtle (Lepidochelys olivacea), Oaxaca, Mexico

Theo Allofs / Little Bee-eater (Merops pusillus) group, Moremi Game Reserve, Okavango Delta, Botswana

Theo Allofs / Grey Heron (Ardea cinerea) taking flight with fish prey, Pantanal, Brazil

Theo Allofs / Jaguar (Panthera onca), Pantanal, Brazil

Richard Du Toit / African Elephant (Loxodonta africana) calves with adult at waterhole, Addo National Park, South Africa. Sequence 3 of 4

Suzi Eszterhas / Meerkat (Suricata suricatta) on alert with three-week-old pups, Makgadikgadi Pans, Botswana

Suzi Eszterhas / Meerkat (Suricata suricatta), duplicate of 00649947

Suzi Eszterhas / Meerkat (Suricata suricatta) two-week-old pups, Makgadikgadi Pans, Botswana

Suzi Eszterhas / Meerkat (Suricata suricatta) mother nursing two-week-old pups, Makgadikgadi Pans, Botswana

Suzi Eszterhas / Meerkat (Suricata suricatta) two-week-old pups, Makgadikgadi Pans, Botswana

Chase Dekker / Great Gray Owl (Strix nebulosa), Sierra Nevada, California

Chase Dekker / Red Fox (Vulpes vulpes) pups, Rocky Mountains, Colorado

Chase Dekker / Brown Bear (Ursus arctos) feeding on sedge grass, Katmai National Park, Alaska

Luciano Candisani / Jacare Caiman (Caiman yacare) with fish school, Pantanal, Brazil

Luciano Candisani / Brown-throated Three-toed Sloth (Bradypus variegatus) in atlantic Rainforest, Brazil

Benjamin Olson / Brown Bear (Ursus arctos) male foraging for salmon, Katmai National Park, Alaska

Mark Raycroft / Caribou (Rangifer tarandus) male, female, and calf, North America

Mark Raycroft / Caribou (Rangifer tarandus) male running, North America

Mark Raycroft / Chocolate Labrador Retriever (Canis familiaris) puppy, North America

Suzi Eszterhas / Hoffmann's Two-toed Sloth (Choloepus hoffmanni) mother and young, Puerto Viejo de Talamanca, Costa Rica

Suzi Eszterhas / Brown-throated Three-toed Sloth (Bradypus variegatus) male hanging in vine, Puerto Viejo de Talamanca, Costa Rica

Ch'ien Lee / Lesser Dawn Bat (Eonycteris spelaea) feeding on Durian Pulu (Durio kutejensis) flower nectar at night, Sarawak, Borneo, Malaysia

Ch'ien Lee / Australasian Giant Centipede (Ethmostigmus rubripes) recently molted juvenile, Sarawak, Borneo, Malaysia

Jami Tarris / Jaguar (Panthera onca) cub, Pantanal, Brazil

Roland Seitre / Naked Mole Rat (Heterocephalus glaber), native to Africa

Roland Seitre / Darling's Mole-rat (Cryptomys darlingi), native to Africa

Roland Seitre / Darling's Mole-rat (Cryptomys darlingi), native to Africa

Roland Seitre / Angolan Giant Mole-rat (Cryptomys mechowi), native to Africa

Roland Seitre / Angolan Giant Mole-rat (Cryptomys mechowi), native to Africa

Roland Seitre / Lesser Egyptian Jerboa (Jaculus jaculus), native to Africa

Roland Seitre / Merriam's Kangaroo Rat (Dipodomys merriami), native to North America

Roland Seitre / Major Mitchell's Cockatoo (Lophochroa leadbeateri) displaying, Nullarbor Plain, Western Australia, Australia

Roland Seitre / Cloven-feathered Dove (Drepanoptila holosericea), native to New Caledonia

Tui De Roy / Marine Iguana (Amblyrhynchus cristatus), Punta Espinosa, Fernandina Island, Galapagos Islands, Ecuador

ZSSD / Reticulated Giraffe (Giraffa reticulata) and Yellow-billed Oxpecker (Buphagus africanus), Kenya

ZSSD / Polar Bear (Ursus maritimus) in snow, captive

Konrad Wothe / Firefly (Lamprohiza splendidula) males flying in forest, Bavaria, Germany

Konrad Wothe / Firefly (Lamprohiza splendidula) males flying in forest, Bavaria, Germany

Roland Seitre / Rock Hyrax (Procavia capensis) showing small tusks, United Arab Emirates

Roland Seitre / Bottlenose Dolphin (Tursiops truncatus) pair jumping, France

Flip Nicklin / Humpback Whale (Megaptera novaeangliae) calf, Maui, Hawaii

Flip Nicklin / Humpback Whale (Megaptera novaeangliae) male and female, Maui, Hawaii

Suzi Eszterhas / Meerkat (Suricata suricatta) two-week-old pups, Makgadikgadi Pans, Botswana

Christian Ziegler / Ocelot (Leopardus pardalis) in rainforest, Manu National Park, Peru

Christian Ziegler / Panther Chameleon (Chamaeleo pardalis) juvenile camouflaged, Amber Mountain National Park, Madagascar

Christian Ziegler / White-necked Jacobin (Florisuga mellivora) hummingbird male feeding on Balsa Tree (Ochroma lagopus) flower nectar, Barro Colorado Island, Panama

Christian Ziegler / Kinkajou (Potos flavus) feeding on Balsa Tree (Ochroma lagopus) flower nectar at night, Barro Colorado Island, Panama

Christian Ziegler / Kinkajou (Potos flavus) feeding on Balsa Tree (Ochroma lagopus) flower nectar at night, Barro Colorado Island, Panama