Insects come and go, wax and wane. years ago we had a massive infestation of blister beetles, then the next year it was crickets.
Then ticks.
Since those days we have had another infestation of crickets, but NO blister beetles.
Right now it is water bugs.
We had the most dragonflies and damselflies when our pond was being taken over by lilly pads. We ended up with so many lilly pads you could hardly see the water and then gently killed them off with a drop of some sort of Round up solution in the middle of each pad. They died off but the biomass encouraged a nasty string algae which finally died off and now the pond is in a pretty good balance. The fish lived through it all. There are still a lot of dragonflies but not as many. Several varieties. They eat the mosquitoes.