在非洲卡拉哈里沙漠，由于雨量稀少，所有的动物自出生就要面临干燥的无情考验。由于纳马夸公沙鸡胸部的羽毛吸水性非常强，为孩子寻水的责任就自然而然落到了它们“胸”上——公沙鸡每天都会到湖边把羽毛在水里浸湿后再飞回家，以此满足小沙鸡对水的渴求。

Sandgrouse（沙鸡）: A father Namaqua sand grouse of Africa's Kalahari Desert flies as far as 50 miles a day in order to soak himself in water and return to his nest, where his chicks can drink from his feathers!