---

In fact, overall, I'm very ignorant to know how to identify. And so I can only .... ask the experts.
Really do not know the exact difference between Musca domestica and Musca autumnalis. From the examples you cite, in the second of them, it seems to me very similar to the male that appears in my picture, so I can not find any difference.
Maybe someone else wants to give us his expert opinion and we clarify possible doubts.

Thank you for your feedback.