I have noticed a serious lack of Mosquitos here in Atlanta metro. I jusr figured the county was being sprayed. Come to think of it I have not seen many butterflies either.
We have many fewer mosquitoes out near Lake Lanier, GA. Fireflies are way down too. Wasps and bees and beetles are healthy though.
And the ants are ridiculous.
Sand flies in Northern Michigan are up, Dragon Flies that eat them down.
This was a huge grass hopper year however.
But these types of up and down populations happen all the time.