In a remote jobsite, I arrived one winter's day to continue building a small industrial facility. I unlocked the door, and returned to my truck as my helper entered the building. I soon heard a panicked yelp, almost a scream, from the helper.
I entered, to find a magnificent snowy owl circling, swooping down for a closer look at us. The own had decided to winter atop the offices. Quite a sight, a bird with a body as big as a chicken and wings that had to span 5-ft.
A few week later, the alarm guys arrived to run their stuff. Wriggling atop the offices, they suddenly shot out, as if there were rockets in their pants. It seems they had just discovered some bones ("owl pellets") just as Ol' Snowy had begun warming up for a warning shriek. All the knew was that there were mysterious sounds, and bones, and they were OUT OF THERE ... mumbling something about not wanting to be the next meal of whatever monster lie in wait
Glad the alarm guys weren't around the day the mountain lion came to visit ....