I'm all in favor of getting rid of cats.
Something else that kills a lot of birds is this California solar project:
A rare and unusual type of solar power plant that concentrates sunlight in California is accidentally killing up to 6,000 birds every year, with staff reporting that the birds keep flying into its concentrated beams of sunlight, and spontaneously bursting into flames.
www.sciencealert.com
It apparently incinerates birds mid-flight. Excuse my morbid curiosity, but it would be kind of cool to see this happen in real time. Oh there's a bird, "poof".