Nice. Love it. Reminds me of that BBC story a few months back about the fox they found hanging out on the 72nd floor of the under construction London Spire, eating leftover lunch scraps and whatnot.
Downtown and the inner city neighborhoods are definitely fox country. You get out into the "suburbs" and the predators get much larger.
I've got a drainageway outside my place in southwest Denver. It's only a couple hundred feet wide, but apparently that's big enough to support a rather large pack of mini-wolves. These damn things bark and howl and yip and are generally quite loud at all hours of the day and night. But entertaining! I imagine that places like Stapleton (my drainageway isn't any wider than that Westerly Creek greenway, and certainly not as big as Sand Creek) will also have good sized coyote packs soon, if they don't already.
These are off my balcony (blurry due to poor/quick resizing effort, sorry).