Studies on nonalien species have not produced similar results, leading researchers to speculate that avian social learning may be fundamentally different from that of mammals.

对非外来物种的研究没有得到类似的结果，这使得研究人员推测鸟类的社会学习能力可能与哺乳动物的社会学习能力有根本性的区别。

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Any shortening of the food chain is likely to destabilise entire ecosystems, possibly leading to new ones in which just one or two species, such as jellyfish, predominate.

食物链的任何短缺都很可能导致整个生态系统不稳定，也许会形成新的食物链，只由一个或两个物种支配，如水母。

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Smith is a leading researcher of poisonous and venomous fish, and says that, while snakes are more often associated with venom, there are far more poisonous species of fish.

史密斯是含毒素和毒液鱼类研究领域的领军人物。 他还说道，虽然人们往往把蛇与毒液联系在一起，但有毒鱼类的种类要远多于蛇类。

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Progress in science and technology is leading to the identification of even more species of coral each year.

VOA: special.2010.08.10

Senator James Buckley, Bill Buckley's brother, was a leading supporter of the Endangered Species Act.

ECONOMIST: Lexington