The songs and calling sites of two European cicadas

Abstract
1. The male songs of two of the commonest cicadas in southern France are described with oscillograms.2. Males of Cicada orni L. aggregate during calling whilst those of Lyristes plebeius (Scop.) space themselves out.3. Both species are widely polyphagous on trees and shrubs, but L. plebeius sings from thinner stems than does C. orni4. Such behaviour may result in the spatial separation of different species in the same habitat.

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