Science_afficionado writes "In the southeastern U.S. fisherman have an unusual way to collect earthworms for bait. The practice is called worm grunting, fiddling, snoring or charming. It involves pounding a wooden stake into the ground and rubbing the top of the stake with a long piece of steel to produce a grunting sound that causes earthworms to come to the surface where they can be easily collected for bait. A study published today in the open access journal PLoS ONE shows that the technique works because the worm grunters are unknowingly imitating the sounds created by burrowing moles. A story on the research with video and audio clips is available at http://www.vanderbilt.edu/exploration/stories/wormgrunt.html and full text of the paper is available at http://dx.plos.org/10.1371/journal.pone.0003472." Link to Original Source
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