Volunteers listen for frogs, identify the species, and give population estimates.

那里的统计员通过听青蛙的叫声来辨别青蛙的种类，然后给出数量的估计。

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A search for frogs believed to be extinct has instead led scientists to discover some new ones.

科学家们在搜寻可能已经灭绝的青蛙的时候意外发现一些新品种。

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Unprotected caterpillars would make a tasty treat for insect-eaters like birds, frogs or larger insects.

未受保护的蝴蝶幼虫对于如鸟类，蛙或者是大一点的昆虫这些食用昆虫的物种来说是一顿美餐。

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And,Mister Hellsten says, genetic changes are rare for frogs, humans and most organisms.

VOA: special.2010.06.29

Yeah, this is not a bad time for me to remind you that in one of Plato's dialogues, Socrates says the Greeks sit like frogs around a pond and that pond is the Aegean Sea.

下面引用一下,柏拉图记录的一段对话,苏格拉底说希腊地形,就像一群青蛙围着一个池塘,而那池塘就是爱琴海

耶鲁公开课 - 古希腊历史简介课程节选

As a result, they used the frogs in fast-acting, low-cost pregnancy tests for women during the nineteen-forties and fifties.

VOA: special.2010.06.29

In the ponds and flooded areas, they're hoping for frogs, toads, newts, aquatic plants, damsel flies and dragonflies.

BBC: Little Ouse Headwaters Project restores Suffolk fenland

After three weeks on the winding back roads of Puerto Rico, politely knocking on people's doors to ask if they could root around on their land for frogs, the researchers were relieved to find plentiful specimens.

NPR: Alarm Over Vanishing Frogs In The Caribbean

Scientists with Conservation International on Monday announced the discovery of 10 new species in what's being referred to as a safe haven for frogs located in the west of the country on the border with Panama.

CNN: New species found in Colombian forests