Male Spider Purrs for Sex
Purring sound attracts female spiders
But a new study of the wolf spider by Alex Sweger, a PhD student in Biological Sciences at the University of Cincinnati, has determined that the vibrations from airborne sounds can also be detected by spiders.
The male wolf spider makes a purring sound by dragging a comb-like organ on its underside across the leaf substrate on which it lives. The resulting vibrations are 'heard' by the female, who responds by making her presence known to the courting male.