Abstract:Copulatory behaviours stand as cornerstones of sexual selection, yet they remain mysterious in many species, especially in bats. An extremely large penile erection with a heart-shape terminal swelling has been observed in the serotine bat (Eptesicus serotinus). The engorgement of the erectile tissues could take place after penetration to generate a copulatory lock. Alternatively, the erected penis, long and mobile, could be used to pass by the protective tail membrane to reach the vulva. In the latter scenario… Show more
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