John MacPherson / Reindeer (Rangifer tarandus) fighting, Cairngorms National Park, Scotland, UK, March.
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Staffan Widstrand / Two Svalbard reindeer (Rangifer tarandus platyrhynchus) fighting; antlers shedding velvet; Spitsbergen, Svalbard, Norway, September
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Denis-Huot / Two male Thomson's gazelles (Eudorcas thomsonii) fighting, Masai-Mara game reserve, Kenya.
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Erlend Haarberg / RF - Wild reindeer (Rangifer tarandus). Fighting males in autumn. Forollhogna National Park. Norway. (This image may be licensed either as rights managed or royalty free.)
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Nick Garbutt / RF - Male Impala (Aepyceros melampus) fighting / sparring. Serengeti National park, Tanzania. March. (This image may be licensed either as rights managed or royalty free.)
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Eric Baccega / RF - Gemsbock (Oryx gazella) males fighting at waterhole in dry season. Etosha National Park, Namibia, Africa. October. (This image may be licensed either as rights managed or royalty free.)
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TJ Rich / Gemsbok (Oryx gazella) sparring at sunset, Deception Pan, Central Kalahari Game Reserve, Botswana.
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Denis-Huot / RF- Topi (Damaliscus korrigum) males fighting, Masai Mara Game Reserve, Kenya, October. (This image may be licensed either as rights managed or royalty free.)
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Laurent Geslin / Close up of heads of two rutting male Alpine Ibex(Capra Ibex ibex) with locked horns, Alps, France
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Nature Production / Sika deer (Cervus nippon yesoensis) two males fighting with horns locked, Shiretoko Peninsula, Hokkaido, Japan, September
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Matthew Maran / Two Blacktail Deer (Odocoileus hemionus columbianus) sparring with locked horns. Ucuelet, Vancouver Island, Canada, September.
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Staffan Widstrand / RF- Arabian oryx (Oryx leucoryx) males fighting with locked horns, Dubai Desert Conservation area, United Arab Emirates. February. (This image may be licensed either as rights managed or royalty free....