Late warning sign
When you see lots of dragonflies it is a warning sign to get ready for an onslaught of nasty bloodsucking mosquitoes. As I was watching the dragonflies while floating in the pool this aft I was wondering why the came a day late, the skeeters were unbearable last night. They are just as bad this evening, nothing worse than hot and buggy inside your house.
Check How to Kill Mosquitoes to learn about vape mats, my top choice indoor mosquito repellant, works great for sand flies and noseeums too.