Hardly any insects. Very few bees of any kind, no dragonflies. Our parasitic wasps have disappeared. Hardly any mosquitoes, so perhaps over-spraying has something to do with it? Also but maybe because ...
Many types of wasps are solitary. They’re lone females who care only about feeding their babies ... Use any type of aerosol wasp spray, but make sure it can spray 10 feet or more so you don’t need to ...