While looking for a photo of a bugling elk I found the following website:
It's a site where photographers can post albums of their photos and it is searchable.
There will probably only be photos of the more common animals but some are pretty good. Here's a great shot of an elk face in high resolution:
Return to The Taxidermy Industry Category Menu
Ask.com, has the same type of a deal. I've searched for reference photos on there that I couldn't find anywhere else and was surprised at how many photos were available. Thanks for the info, I'll add it to my favorites.