Campsite Set-up

The funniest thing happened to me when I was setting up my tent. I could have sworn, out of the corner of my eye, I saw something of about knee-height rustling in the bushes. Figuring it to be a boar, I aimed my musket and fired into the brush, but whatever was there was gone when I went to find my kill. That was strange, but just an hour later, when I had finally set up the campfire, did I feel eyes on me again from the same bush. Was this boar watching me? Or am I going insane?