Wild animals are very picky about their living environment. That the birds come and raise their next generation here is a kind of stamp of approval for the environment. We should do our utmost to protect wild habitats.
野生動物極度敏感，對棲息環境十分挑剔，它們來此繁殖下一代是環境尚可的一種指標，我們自當極力維護。