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Odd Deer Herd

Muley in with WT?
Other way around. The one in the middle is a whitetail. The rest are mulies. Muley tails are white with black tip kind of rope like. Whitetails have a black layer of fur when they are not on alert and then the white "flag" when they are alerted. Whitetails also have wider tails than mulies.
 
Awful dark on the backside of that tail for most whitetails. Also the head/ears don't really look 100% whitetail, could be a hybrid.
Could be. I believe this is in the area around Wheatland and with so many of both species they mingle now and then and I doubt if you find a true purebred of either species in that area.
 
But... in saying what I did about hybrid I am not a biologist and not 100% sure hybrids can breed. I know with mules which are a cross between a horse and a donkey that the jennies are generally infertile.
 
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I will admit hybrids are rare, but they do happen. I also will agree that there are diffierences in pelage geopgraphically and from among individuals. There are only a few scientific methods to determine a true hybrid. This isn't the greatest pic either, but comparing the ears to the mule deer on the left with the the middle deer you have to admit that they are similar in size and coloration. The middle deer also has a darker "scalp" above the eye than most of the whitetails that I am familiar with. It would help to have some better photos and some photos from other angles, but short of putting it on the ground and doing some measurements and or genetic testing we will never know. I also agree that antler configuration is a very poor way to determine hybridization, especially when they aren't present.
 
Mule deer/whitetail hybrids are extremely rare, even in areas where mule deer and whitetails frequently coexist.

While learning about hybrids in my local area I found out that your statement is mostly true for first generation hybrids, but the hybrid females that do occur are able to breed and so the hybrid genetics actually persist in the population at varying levels depending on the frequency of new hybridization events. The hybrid traits can pop up here and there in the population, or just express as slight variations from what we think of as normal. Since it's usually whitetail bucks breeding mule deer does it tends to be the mule deer population that holds the most whitetail genetics. But it could also just be variation of genetics, the metatarsal glands or an actual DNA sample are the only way to really know. Hard to tell from the photo. Been meaning to update the thread I started about hybrids awhile back, there's a pretty good article that one of our local biologist sent me about it.
 
Given your location, I assume these are Wyoming deer. I think a whitetail-mule deer hybrid is a possibility, but I would like to see more whitetail traits before I went down that road. If you want to talk about mixed genes, I would actually suggest that the odd genes look more like blacktail than whitetail. Geographically, that doesn't seem like a viable possibility for a straight up hybrid, but I bet there's some genetic material popping up every once in a while.

QQ
 
A picture with some whitetail to compare tail coloring. There is quite a bit of black hair on the deer on the far left side of the photo.
IMG_0163 (4).JPG
 
I’m having a hard time seeing anything whitetailish in any of those deer in that picture.
 
Mule deer/whitetail hybrids are extremely rare, even in areas where mule deer and whitetails frequently coexist.

Mule deer white tail crossbreds are known as blacktail deer and hardly rare. A seperate species now. Genetically proven fact. In the top photo I see 2 mulies and 2 blacktails.
 
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