BA,

It actually does reference the fertility of hybrids indirectly. It says that a 1/8 whitetail 7/8 mule deer can't stot. Obviously they'd have to be fertile in order to get that degree of hybridization (F3). Here's another article that probably doesn't hold much weight either, but at least it's better than Uncle Billy Joe Jim Bob, who dun seen of them thar half-breeds down by the crick.

http://www.coueswhitetail.com/coues_biology/hybrids.htm

AK Jeff