New video Fox dog mating with vixen..

Dog foxes begin the entry to breeding condition in August, as the production of sperm resumes following a hiatus during the late spring and summer months—accordingly, the testes have increased in size by around six-fold come December (from 1-2 grams to 7-8 grams). The greatest quantities of mature sperm are produced during December and January, after which sperm production reduces; sperm may be present in the epididymis until April (some studies have found sperm in every month) but will have deteriorated to such an extent as to be largely useless. It seems that foxes undergo significant increases in testes size, and invest relatively more energy resources into producing sperm-making tissues, because there’s a high demand for sperm given the brief period during which this species can breed.

New video Fox dog mating with vixen..

 

 Two urban foxes mated in my garden. The male fox seemed to have an injured paw but that wasn't going to stop him. After mating they were 'tied' or 'locked' just like dogs. They stayed locked together for 35 minutes.