I still my kick myself over this one, I killed a 4 point I thought was a doe a few years ago. I was 20 foot up in a tree stand, he was spooked when he got wind of another hunter on the property next to where I was hunting so he was moving at a good clip, I was convinced it was a doe, well he stopped just long enough for me to drop him in his tracks, the top of his head was obscured by some branches so until I went to get him I thought it was a doe. If it is thick it can be hard to tell buck from doe, little lone button from doe. BTW it was buck or doe so I was not worried about an illegal kill.