Correct me if I'm wrong but I believe the pacific hybrid is a term used to separate the deer by CBH and CDA fir scoring purposes? There are over 5 different subspecies in California alone and the deer in our parts are scientifically recognized as the Southern mule deer. When the DFG used to conduct scientific data collection on deer, I was told we have the southern, desert, and a cross between the two (lagunas, borrego, parts of riverside,etc.).