Yukihiro Fukuda / Japanese macaque (Macaca fuscata fuscata) mother with rare white furred male baby, Jigokudani Valley, Nagano Prefecture, Japan. June.
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Charlie Summers / Lion (Panthera leo) ready to mount female, Ngorongoro Crater, Tanzania.
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Doug Gimesy / Grey-headed Flying-fox (Pteropus poliocephalus) hangs from one foot from a branch. Yarra Bend Park, Kew, Victoria, Australia. December, 2017.
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Andy Rouse / Indian Flying Fox , (Pteropus giganteus), roosting, India
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Franco Banfi / Zebu bull, Bonito, Mato Grosso do Sul, Brazil
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Staffan Widstrand / Wild Wonders of China / Portrait of a male Golden snub-nosed monkey (Rhinopithecus roxellana) Foping Nature Reserve, Shaanxi, China. Endangered species
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Daniel Heuclin / Potto (Perodicticus potto) male in tree, Togo. Captive.
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SCOTLAND: The Big Picture / Scottish wildcat (Felis silvestris grampia) male, on back to show underside for pelage scoring. Inside The Royal Zoological Society Scotland / RZSS mobile vet unit, Strathsprey, Cairngorms National P...
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SCOTLAND: The Big Picture / Conservationist from The Royal Zoological Society Scotland / RZSS measuring the size of a Scottish wildcat's (Felis silvestris grampia) testes. Inside RZSS mobile vet unit, Strathsprey, Cairngorms Nat...
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Luke Massey / Proboscis monkey (Nasalis larvatus), Tarakan, Indonesia
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Luke Massey / Proboscis monkey (Nasalis larvatus) male, Tarakan, Indonesia
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Anup Shah / Eastern chimpanzee (Pan troglodytes schweinfurtheii) male 'Faustino' aged 22 years, rear view showing testicles. Gombe National Park, Tanzania.