I was out at Malden Park in Lasalle and some of the trees were covered with these. I thought at first they were ticks, but I'm figuring that they are actually mites. One got on to my hand and bit me and it made the entire back of my hand itch for an hour. Just wanted an id on this to know what it is and if I got anything to be concerned about. Don't know much about mites if it is one.