The Aedes mosquitoes that are invading Los Angeles will apparently breed in an upturned bottle cap or "in the depression of a wrinkled old bag of chips that gets hit by a sprinkler.". Good luck finding all pools of water that big on any significant property. (LA Times semi-paywalled article: https://www.latimes.com/science/sciencenow/la-sci-sn-aedes-m... )