Kinky Female Bats Share Mates With Their Mothers

Kinky Female Bats Share Mates With Their Mothers, Avoid Incest
(LiveScience)

“She won’t mate with her father. But she will mate with her mother’s partner—but only when her mother has switched partners,” said study leader Stephen Rossiter of the Queen Mary, University of London of the female bats.

I bet they have some awesome ultrasound swearwords.