I have been campaigning against those ubiquitous black boxes filled with the most powerful rat poisons.  They're found in shopping malls, office parks, and train stations, and their collateral damage is extensive.

Tragically, owls die an excruciating death after eating a poisoned rat.

If you think owls don't eat many rodents, check out the above YouTube video, suggested my Screech Owl Companion co-author, Scott Weston. 

Impressive job by Megascops' Manors.