Sorry this is probably pretty easy, but I want to just make sure. I have been helping a local golf course try to get Audubon certification. We have put up 10 blue bird houses (43 eggs and 35 fledglings this year), 4 bat houses, one purple martin house and 2 wood duck boxes. We are considering a few Kestel boxes. Our easiest location would be on both a live and a dead tree about 10-30 feet up facing SE as per easily found suggestions. My question is the need for a predator gaurd. All the other boxes we have put up (save the bat boxes) have gaurds and I don't see mention of a need on Kestrel box. If recommented, what are the options for use on a tree?
Thank you in advance...stan