My very own males, when housed togeather normally appeared to ignore one another, though I did word it was relatively unusual for 2 males to attempt to mate the identical feminine without delay. The 2F:1M result documented got here from two separate breedings of associated snakes that had been housed in collections 3,000 km apart. When breeding Barkly Adders, Gow and Barnett appeared to get a 2F:1M sex ratio in offspring.