按英亩来算，有些保护区，例如那些位于雨林，热带草原或者红树林沼泽的地方- - -平均每亩保护的物种要比其他保护区多的多。
Acre for acre, some sanctuaries-such as those in rainforest, tropical grassland or mangrove swamps-offered a lot more species protection per acre than others did.
茂密的本土森林是很多色彩艳丽的稀有鸟类的家园，同时还有众多的鸟类遍布南非的草原、沙漠和红树林沼泽。
The thick indigenous4 forests are home to many exquisitely5 coloured and unique birds, while a veritable6 flurry7 of species occur throughout South Africa's grasslands, deserts and mangrove8 swamps9.
大约有160种稀有禽类生活在此处的沼泽地和大草原里。
About 160 species of rare birds live in the swamps and prairie there.
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