Most birds build nests, but several different families of birds evolved what is called brood parasitism, where females lay eggs in another individual's nest.

大多数鸟类筑巢，但几个不同的鸟类科进化出所谓的育雏寄生，雌性在另一个单独的巢中下蛋。

REPORTER: Funded by donations or by people sponsoring individual nests, Graham says the project is so far installed more than 1,500 nests around South Africa's penguin colonies.

有了捐款和个人资助独立巢穴，格雷厄姆说，这个项目到目前为止已经在南非的企鹅栖息地周围建立了1500多个巢穴。