So this was an absolutely odd and fascinating scene – scroll down to view the complete sequence.
Two mule deer does were in a bit of a standoff with a ferruginous hawk. The deer tried to stomp the hawk but when they got close, the hawk jumped at one of the deer and seemed to bite its tail.
I suspect there may have been a fawn in the grass, out of sight, and the does were protecting it but I have never seen anything like this. View the album to see the entire sequence.
Taken at the Rocky Mountain Arsenal National Wildlife Refuge.