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Male same-sex sexual behavior

Image   •   May 13, 2016 01:00 BST

A group of male seed beetles. Two of the males are mounting and trying to mate with two other males, which happens frequently when males are kept in single sex groups.
License Creative Commons Attribution, no derivatives (?)
Photographer / Source Ivain Martinossi-Allibert
Size 183 KB
Format .jpg
Image dimensions 1472 x 821 pixels