Carol Walker / Photographer Carol Walker with her adopted wild horses / mustangs Claro, Cremosso and Mica, rounded up from the McCullough Peak herd and Adobe Town Herd in Wyoming. Resting in their corral, Colorado,...

Carol Walker / Photographer Carol Walker with her adopted wild horses / mustangs Claro, Cremosso and Mica, rounded up from the McCullough Peak herd and Adobe Town Herd in Wyoming. Resting in their corral, Colorado,...

Carol Walker / Photographer Carol Walker with her adopted wild horses / mustangs Claro, Cremosso and Mica, rounded up from the McCullough Peak herd and Adobe Town Herd in Wyoming. Resting in their corral, Colorado,...

Carol Walker / Wild horse / mustang called Mica, rounded up from Adobe Town Herd Management Area in Wyoming and adopted by photographer Carol Walker. Saddled and preparing to be ridden for the first time by trainer...

Carol Walker / Wild horse / mustang called Mica, rounded up from Adobe Town Herd Management Area in Wyoming and adopted by photographer Carol Walker. With trainer Rich Scott, saddled and preparing to be ridden for t...

Carol Walker / Wild horse / mustang called Mica, rounded up from Adobe Town Herd Management Area in Wyoming and adopted by photographer Carol Walker. With trainer Rich Scott, saddled and preparing to be ridden for t...

Richard Du Toit / Burchell's Zebra (Equus burchellii) males fighting, Rietvlei Nature Reserve, Gauteng, South Africa

Wild Wonders of Europe / Möllers / Wildlife biologist mounting an infra-red triggered wildlife monitoring camera to a tree pointing towards a wallow to monitor European bison / Wisent (Bison bonasus) and Red deer (Cervus elaphus), Buko...

Wild Wonders of Europe / Möllers / Wildlife biologist mounting an infra-red triggered wildlife monitoring camera to a tree pointing towards a wallow to monitor European bison / Wisent (Bison bonasus) and Red deer (Cervus elaphus), Buko...

Kathryn Jeffs / Stabilising system for mounting a camera on the 'Golden Fleece', ship used as base for the film crew on location for BBC Frozen Planet series, off Northern tip of the Antarctic peninsula, Antarctica,...

Kristel Richard / A wild Exmoor Pony (Equus caballus) breeding stallion mounting one of his mares, while her colt runs around. Langeland Island, Denmark, April.

Klaus Echle / Taxidermist in his studio working on mounting Lynx (Lynx lynx). Specimen was killed on a road. The Black Forest, Germany, March. Captive.

Klaus Echle / Taxidermist working on mounting a Lynx (Lynx lynx). The specimen was killed on a road. The Black Forest, Germany, February. Captive.

Klaus Echle / Taxidermist working on mounting a Lynx (Lynx lynx). The specimen was killed on a road. The Black Forest, Germany, February. Captive.

Klaus Echle / Taxidermist working on mounting a Lynx (Lynx lynx). The specimen was killed on a road. The Black Forest, Germany, February. Captive.

Klaus Echle / Taxidermist working on mounting the skin of a dead Lynx (Lynx lynx) that had been run over, commissioned by the Forest Research Institute, Freiberg, The Black Forest, Germany. Highly commended, Man a...

Donald M. Jones / White-tailed Deer (Odocoileus virginianus) buck trying to mount doe, western Montana

Charlie Summers / American Bison (Bison bison) cow scratching against a Prairie Dog mound, with two raw places on her back, this is indicative of a recent mating, where wounds were incurred from the bull mounting her....

Kristel Richard / A samurai (warrior) from the Takeda School of Horseback Archery mounts his horse, during the training prior to a Yabusame (Japanese mounted archery), at Meiji Jingu Shrine, Tokyo, Tokyo Prefecture, Ja...

Anup Shah / Mature male Gelada baboon (Theropithecus gelada) mounting sub-mature male as part of a social ritual, Simien Mountains National Park, Ethiopia, November

Suzi Eszterhas / Grevy's Zebra (Equus grevyi) stallion mounting female, Lewa Wildlife Conservation Area, northern Kenya

Carol Walker / Mustang / wild horse stallion mounting mare to mate with her, Adobe Town Herd Management Area, Southwestern Wyoming, USA, sequence 3/4

Carol Walker / Mustang / wild horse stallion mounting mare to mate with her, Adobe Town Herd Management Area, Southwestern Wyoming, USA, sequence 4/4

Roy Mangersnes / Southern elephant seal (Mirounga leonina) pair mating. Satellite male mounting a harem female before the dominant male beach master realizes. Fortuna Bay, South Georgia, Antarctica. November

Suzi Eszterhas / African Elephant {Loxodonta africana} bull mounting female, Masai Mara Triangle, Kenya

Yukihiro Fukuda / Japanese macaque / Snow monkey {Macaca fuscata} young male mounting another monkey, Jigokudani, Nagano, Japan

Yukihiro Fukuda / Japanese macaque / Snow monkey {Macaca fuscata} playing with snowball and play mounting another monkey, Jigokudani, Nagano, Japan

Jose B. Ruiz / Juvenile Domestic pigs {Sus scrofa domestica} mounting another, Spain

PREMAPHOTOS / Giant millipede {Epibolus pulchripes} male mounting another male, who is in the process of courting a female, tropical dry forest, Kenya

Jane Burton / Sable Border Collie dog pup, 14 weeks old, mounting Lurcher pup, 10 weeks old, on first meeting

Jane Burton / Sable Border Collie dog pup, 14 weeks old, mounting Lurcher pup, 10 weeks old, on first meeting

Jane Burton / Border Terrier bitch snarling at her grown up pup who is mounting her during play.

Jane Burton / Border Terrier bitch snarling at her grown up pup who is mounting her during play.

Carol Walker / Bay stallion mounting black mare with bay filly in background, Pryor Mountains, Montana, USA.

Carol Walker / Bay stallion mounting black mare with bay filly in background, Pryor Mountains, Montana, USA.

Anup Shah / African buffalos {Syncerus caffer} mating, Masai Mara GR, Kenya

Anup Shah / Cape buffalo {Synerus cafer cafer} about to mate, Serengeti NP, Tanzania

LYNN M. STONE / Eastern box turtle male mounting female {Terrapene carolina carolina} Michigan, USA

ASHISH & SHANTHI CHANDOLA / Southern plains grey / Hanuman langur {Semnopithecus dussumieri} female mounting another female, showing dominance, Bandipur NP, Karnataka, India

Philippe Clement / Young ibex mounting each other {Capra ibex ibex} Gran Paradiso NP, Alps, Italy

Anup Shah / Common zebra male mounting female {Equus quagga} Masai Mara GR, Kenya East Africa

Anup Shah / Common zebra mating behaviour - male attempts to mount female {Equus quagga} Masai Mara GR, Kenya East Africa

Anup Shah / Common zebra male mounting female {Equus quagga} Masai Mara NR, Kenya

Tony Heald / African elephant bull mounting dead bull elephant {Loxodonta africana} Koakoland, Namibia

Asgeir Helgestad / Red foxes play mounting {Vulpes vulpes} Norway

Sumio Harada / Bighorn Sheep (Ovis canadensis) lambs playing, Glacier National Park, Montana

Onne van der Wal / Young boy mounting the rudder in an Optimist dinghy during training in Florida, USA

Donald M. Jones / White-tailed Deer (Odocoileus virginianus) buck mounting doe, western Montana