I'll try and make this as painless as possible.Myself,I grew up in Idaho where the Mulies ruled for years and logged my whole life seeing game everyday almost.My wife spent 15 years with the Forest Service on the Payette National Forest out of McCall Idaho where we both lived and she was on the Survey Crew seeing her share out and about.

Well one day Bowhunting we saw antlers that looked like Elk in a ravine and we argued as to what it was thru the binocs as we could not see the body or head..So we waited and argued as to what is was...Then it stood...A mix of some sort with the body of a body builder(Very Muscular)and the head of a deer but the rack of an Elk..Which one I have know idea.The rack of an Elk but the body of a deer.Dangest thing I have ever seen and I have seen alot of game.To this day-I have know idea who did who to look like that right on the top of the Salmon River drainage by Burgdorf Idaho.The thing that amazed me the most was the (Body Builder look)Never seen it before or after.

Jayco.

It happens with Texas Aggies and sheep all the time.

Oh wait, you were talking about two DIFFERENT species, weren't you?

As I understand it, it is more common to find a whitetail buck breeding a muley doe, but the opposite obviously occurs. The mule deer is presumably a hybrid of the whitetail and the Columbia Blacktail and is only a few thousand years old. While whitetail/muley offsring MAY be sterile, some can be fertile (just like mules). I hunt an area where both species occur, but identifiable crossbreeds are surprisingly rare. Some think that they are poor survivors due to their ungainly locomotion which is neither a run nor a stot.

Wendell: I've seen that weird gait several times. It's like the deer doesn't know how to run, almost tripping over himself in confusion.