Contrast to what was commonly believed, tests on everything from turtles to lungfish reveal many silent creatures occasionally get vocal.
“We got to a very opposite conclusion [from Chen and Wiens],” Jorgewich Cohen says.
He and his colleagues then analyzed previous research on animal sounds — adding an additional 1,800 or so more species, including birds, reptiles, amphibians and mammals, to the 53 they’d tested themselves. It’s worth noting that the researchers were listening exclusively for sounds made from the vocal tract. In other words, they didn’t count things like the sound a rattlesnake’s tail makes, for example.
— a group that includes the ray-finned fishes and a huge number of living fish species. “Expanding our analysis to include actinopterygians may reveal the origins of acoustic communication to be even older than 407 [millions of years ago],” he says.Wiens, however, now a professor of ecology and evolutionary biology at the University of Arizona, says the latest study is “a bit of a bait-and-switch.
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