It's been a long break since I did any mammal skulls, but I'm back. This bighorn was 80% done when I last left it - I must have gotten tired, filling in the horn detail. As the skull is back in San Diego, I had to work from some photos I'd taken of that skull, to finish the drawing. Next, I need to work on the side view, though I never did find out conclusively what to do about the large curving horns that block out a good portion of the face. As these drawings are for a guidebook, I figure one can be pretty sure when they've found a male bighorn skull, and don't have to look for details in the skull drawing to match to the specimen. Thus some facial blockage in the drawing won't be a big deal.
Bighorn skulls are really heavy by the way. Those sheep must have some massive neck muscles.