At one time my backyard looked free and open all the way to Nebraska, but the city of Boulder put some restrictions on new home development within their limits and they started building everywhere around me. They even split up a portion of Boulder county and created the new county of Broomfield and even a new town called Anthem built on a hillside that was open country I could once view from my backyard. I would see these little brown lizards, fox and pheasants around the fields 25 plus years ago, but I haven't seen any of those now in years. They did set aside a lot of open space lands that you can still get out to enjoy nature within this rapid developing world, which makes it nice for people to enjoy. Most the fox I see now have moved into the older residential areas that have been around with the old growth vegetation of a 100 years or so, I believe the fox find those areas safer from coyote that have run them out of the limited open country we now have around here now.