Once I put a long term proven breeder male grayband in with a young virgin female that was definately ovulating and all he did was tongue flick a few times. So I put him in with a different female, a half-sibling which he had bred with many times, both that year and in years past, and right away he started courting her.



I did the same with the ovulating virgin female, put her in with a different male and he started courting her. Since I specifically wanted her to breed with the first male I separated this pair before they could copulate and put her back in with the first male: nothing. No breeding activity whatsoever except for some minor tongue flicking and then he coiled up in the corner.



I again separated them and put the first male in with his half-sister and they copulated. I put the ovulating virgin female in with the second male and they copulated.



I have a pretty good sized collection of graybands and this is the only instance to date that I have seen a male refuse to breed any female.



Of note is that the first male, the one that wouldn't breed the virgin female, was complely unrelated to the virgin female but the female that he did breed was his half-sister. This even though he had previously bred other non-sibling and/or completely unrelated females.
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