>>Look at the markings on the head of yours, and look at his fathers markings:
That's amazing. Thanks for sharing. FWIW, the females' head markings were different. In fact, I usually try to sketch a few distinguishing characteristics on each animal's cage card, and this trio's instance, I drew the different head markings because they were easy ways to distinguish each of the three. Other times it's notations that "bands 7, 14 and 22 are broken," or "rings 8 and 9 form a Y on the left side," things like that. The similarity in these two heads really is remarkable. I'm told I look a lot like my dad when he was my age.