One time when I had my Arrow hangared at a small field 40 miles from home while waiting to get a hangar at my home field, I was putzing around one evening and was the only one at the airport... at least, the only human. A ground squirrel scampered across the ramp just outside, walking the width of the open hangar door. All of a sudden he stopped as he seemed to realize the door was open, turned, and looked inside. I could see him looking around, seemingly fascinated at being able to see in there for the first time. He sat there for a couple of minutes, occasionally sniffing in curiosity, then went home. I always had the idea that he got home from work late, with his spouse demanding to know where he had been. Upon hearing his story about seeing one of the strange metal birds that were always buzzing around on the ground in an open "nest," she probably accused him of stopping for a few ground squirrel beers with his buddies and making up a story.
Then there is our APC here at BMI. APC= Air Port Coyote. He's been here a long time and knows not to get in the way of airplanes, but he does like to watch them. We all know him here. One evening while I was taxiing out a somewhat concerned Mesaba crew, also taxiing, told ground there was a coyote next to the taxiway watching airplanes. Ground told them not to worry. Mesaba then called in a more concerned voice saying the coyote had just crossed the taxiway. Tower simply said "roger." I couldn't stand it, and keyed the mic. "Mesaba 123, caution wake turbulence behind departing coyote." I don't think they were amused.
TM