I saw a very similar pic about a year ago ... presumably from (the same) trail camera - same incident ... strikes in my mind August of last year, Oregon. The pic I saw showed more of the deer (and less of the lion)... looked legit. My guess is that shortly after the pics were taken the deer (buck) was no longer able to contribute to the gene pool. Hmmmmm ... deer sure don't let fME ride them so close.