There have been numerous reports of a cougar in the vicinity of Leslie Park Golf Course. Here is an article from AnnArbor.com explaining this phenomenon.
I spend a lot of time on the golf course and have seen many animals and wildlife. I have seen hawks, deer, turkeys, eagles, ducks and geese, among others. In my opinion, the animal that has been seen is a coyote. I have seen brown and tan colored coyotes many times, especially near hole #9, which is next to Leslie Woods.
I do not totally discount the idea that a cougar may be on the loose, but I think it is more likely this large canine. Whichever the case, it is very elusive and probably will hide at the first sight of human activity, but please be careful when walking any of the nature areas and parks in Northern Ann Arbor.