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Africa's Wild Havens:

Why Do Giraffes Have Patches?

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Why Do Giraffes Have Patches?

Short | 01:50

The dark patches on a giraffe's body hide an intricate network of blood vessels and glands. These allow blood to flow through them, releasing heat and cooling the body.

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It stands tall in the semi-arid desert of the Kalahari, giving its inhabitants much-needed shade during summer days, large pods when food is scarce, and a foundation for one of the most remarkable constructions built by a colony of birds. It's the camelthorn, one of only a handful of large trees that can take root in the Kalahari's deficient soil. Discover the evolutionary secrets that allow it to tower as a master of survival in the vast expanses of these African plains, where living is an often unthinkable challenge.

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