Once ran a concrete batch plant that stood about 110' tall with a conveyor belt and catwalk running up to the top to feed the plant.
An owl had built a nest up top and we mostly worked around it to let it do it's thing. One day I'm walking up the catwalk and the entire length was littered with headless gophers, rats, mice, ground squirrels and moles. Surrounding the nest were piles of headless rodents waiting to be fed to the owlets.

Creepy