At times it hunt for birds, frogs and fish.

有时也猎取鸟类，蛙类和鱼类。

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They believe that the steep decline in populations of many animal species, from frogs and fish to tigers, is as fast as any of the last five extinctions in the past 540 million years.

他们认为，近年来，许多动物物种数量的急剧减少，像青蛙、鱼类和老虎等等，其锐减速度赶得上过去5亿4千万年以来五次大规模物种灭绝的任意一次。

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The new model additionally helps to explain the gliding technique of many other species, including certain mammals, frogs, lizards, snakes, ants, fish and squid.

这个新的模型也解释了其他种类动物的滑翔技术，包括哺乳动物，青蛙，蜥蜴，蛇，蚂蚁，鱼和鱿鱼。

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Pliny the Elder, writing in the first century AD, mentioned storms of frogs and fish.

BBC: NEWS | UK | Magazine | How can it rain fish?

Another 31 million is used to irrigate crops, and 39 million more flows through rivers and streams, keeping the fish and frogs wet.

FORBES: Magazine Article

He'll also be donning his wetsuit for a live encounter with predatory pike which have been known to eat small water fowl as well as fish and frogs.

BBC: Springwatch returns to Ynys-hir reserve in mid Wales