I found this guy while fishing for brown trout near a little spring feed creek in Southwest Michigan (8/30/04). The creek has dense tree cover over it. This guys was on a telephone pole by the road. The body was about three to four inches long and with it’s legs it outstretched, it was easily as big as my hand. It seems like a bigger version of a crane fly. I suspect the trout probably feast on these guys when they are in their emergent phase? Here is a couple images. Thank you.
I can’t give you an exact species name, but you do have one of the larger Craneflies from the Family Tipulidae. The insect is nicely camoflauged against the dead wood. You are probably right that they make good trout food. They are sometimes thought to be giant mosquitos, but they are in fact harmless to man.