Sand grouse ： afathernamaqua 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 公沙鸡：在非洲卡拉哈里沙漠，纳马夸公沙鸡每天都会飞50英里，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。
