00969nas a2200133   4500008004100000245009200041210006900133300001400202490000700216520053300223100001800756700002000774856004100794       1976                        eng d00aUltrasonic clicks produced by the peacock butterfly: a possible bat-repellent mechanism0 aUltrasonic clicks produced by the peacock butterfly a possible b  a639–6440 v643 a<p>Torpid peacock butterflies (Inachis io) produce intense ultrasonic clicks that startle captive vespertilionid bats (Plecotus auritus and Pipistrellus pipistrellus). The clicks occur as the wings are opened and are generated by a stiff portion of wing membrane between the costal and subcostal veins near the base of the forewing. The power spectrum of a click matches the most sensitive area of a bat&#39;s audiogram. Clicks may serve as acoustic equivalents of the attack-retarding eyespot display in the same species.</p>
1 aMøhl, Bertel1 aMiller, Lee, A.  uhttps://bio.acousti.ca/de/node/53407