I'm way late into this discussion, but just got here and read the entire 38 pages. I don't know what's in that picture of yours, but my dh says it's a cat, not a fox, not any canine. He's a hunter, and I trust his opinion, although you have no reason to. I think you're about 50/50 split on the original question. What I did want to say, just becuase i did read all 38 pages, is that I live 20 minutes from the Quabbin here in Western Mass, and fly fish there generally 4 or 5 mornings a week throughout the spring and summer with my husband, and I have seen mountain lions in the Quabbin. Now, in case you are going to tell me I saw something else and thought it was a cat, I have seen it enough times to know what it was, and it had a cub following along behind it this past season. THey have a lottery here to allow people to hunt deer in the Quabbin, very few get to hunt, very few actually hit anything, so the deer population is crazy and could easily support some cats. Most of the place is also off limits to most everybody and there are only a few walk-in trails where we're allowed to fish. I've been going there for the past 12 years, and I never even saw anything that looked like a cat until about 5 years ago, and almost had a stroke that time, but since then, it doesn't surprise me as much anymore. They are here in the Quabbin, so it wouldnt surprise me a bit if they were down your way too.