在一些鸟类，嘴软周边地区发生的。
在一些湿热地带，大型食肉植物能够捕捉老鼠、鸟类和青蛙。
Large carnivorous plants in some hot and wet areas have been known to capture rats, birds, and frogs.
在人类出现很早以前，地球上就出现了鱼类、爬虫类、鸟类和一些哺乳动物。
Long before Man lived on the Earth, there were fishes, reptiles, birds, insects, and some mammals.
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