Namibia Namibia

An endangered black rhino is seen in this file photo from the Etosha National Park in norhern Namibia last year. An American hunter has killed one of the animals, under a special permit he bought for $350,000. While the rhinoceros is referred to as black, its colors vary from shades of brown to gray. Barbara Scheer/DPA /LANDOV hide caption

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Barbara Scheer/DPA /LANDOV

A black rhino and a giraffe stop for a drink in Namibia's Etosha National Park. Only about 5,000 black rhinos remain in the world. Frans Lanting/DPA/Landov hide caption

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Frans Lanting/DPA/Landov