Sven Zacek / Black grouse (Tetrao tetrix) male displaying at lek on frosty morning, rear view. Vorumaa, Southern Estonia.
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Nick Upton / Siberian flying squirrel (Pteromys volans) entering nest hole in Downy birch (Betula pubescens) tree trunk. Mature mixed forest, near Lisaku, Ida Virumaa, Estonia. April.
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Nayan Khanolkar / Bengal tiger (Panthera tigris tigris), female scent marking tree. Camera trap image. Pench National Park, Madhya Pradesh, India. January 2018.
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Richard Du Toit / Tail and buttocks of Burchell's zebra (Equus quagga burchellii) Kruger National Park, South Africa.
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Denis-Huot / RF- Wildebeest (Connochaetes taurinus) giving birth, Masai-Mara Game Reserve, Kenya. (This image may be licensed either as rights managed or royalty free.)
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Mark MacEwen / 1468136 - - Mandrill male (Mandrillus sphinx) abstract of brightly coloured ischial callosity on buttocks, Lekedi National park, Gabon.
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Mark MacEwen / Mandrill male (Mandrillus sphinx) abstract of brightly coloured ischial callosity on buttocks, Lekedi National park, Gabon.
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Nick Garbutt / Desert succulent "Bushman's Buttocks" / Living stones (Lithops sp) Skeleton Coast Park, Namibia.
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Roberto Rinaldi / Crocodile Man, scarification from the wagan initiation ceremony into manhood. The skin on the chest, back and buttocks of the initiate is cut with a bamboo sliver. The scars, when healed, represent th...
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David Tipling / Muntjac deer (Muntiacus reevesi), buck, running along edge of barley crop field ,North Norfolk, UK. June.
