In March of this year, Mental Floss published this gem by Kirstin Fawcett:
“Can’t afford a private eye? A feline might be able to do the job for free. In the 1960s, Ambassador Henry Helb—who then lived in the Dutch Embassy in Moscow—noticed that his two Siamese kitties were arching their backs and clawing at one of the walls. Helb had a hunch that the cats heard something he couldn’t, and sure enough, he found 30 tiny microphones hidden behind the boards. Instead of busting the spies, Helb and his staff took advantage of the surveillance and griped about household repairs or packages stuck in customs while standing in front of the mics. The eavesdroppers took care of their complaints—and apart from Helb and his companions, no one was the wiser.”
from “50 Fascinating Facts About Cats” http://mentalfloss.com/article/578211/cat-facts
The house cats here are real good about finding bugs, and eating them.