In Illinois we have deer like that in certain area. They tag a good amount of them to see how far they travel. I know in the suburbs of Chicago we have some. Over the last 3 years we've had a wise old doe that would come to my parents backyard every few days. I don't live up there anymore but over the course of a few years I saw this doe 1.5 miles away before she started to hang out in my parents backyard. You could tell she was old and had the collar on for a while. She was #113 by her ear tag. From what we had found out it had been over 10 years since she was tagged.

I was told by one of the forest preserves that they actually encourage the legal harvesting of these deer. The batteries don't last too long in the collars and they like to see where they are harvested and the distance they have traveled from where they are collared. They can also get the weight and age compared to when it was tagged. Plus, its an interesting harvest picture to have a deer with a radio collar on it!