guardian:  A two week-old eastern bongo calf looks out from under her mother at Sydney's Taronga zoo. Eastern (or highlands) bongos are critically endangered with as few as 75 remaining in small groups of 6-12 animals in their Kenyan upland range. Bongo are one of the largest species of antelope in the world and are recognised by their striking russet colour and large antlers which extend over their backs Photograph: William West/AFP/Getty Images
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