Add Yahoo as a preferred source to see more of our stories on Google. Haddadus binotatus emits a distress call at frequencies that humans cannot hear, but predators can. Ultrasound in nature are ...
A study reported in the journal Acta Ethologica recorded the use of ultrasound by amphibians for the first time in South America. It also describes the first documented case of the use of ultrasound ...
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