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Biologists discover caterpillars are able to sense electrostatic fields generated by predators
[The researchers tested specimens of cinnabar moth, the scarce vapourer moth and the European peacock butterfly] for the ability to sense and react to an artificially generated electrostatic field that matched the output of that generated by a wasp. [All] three species responded very clearly to an electrostatic charge—some flailed their bodies, others coiled in a defensive posture.