For me it's red wasps. Growing up in Texas there used to be so many, you could see them flying low searching for spiders in the grass. Last Sunday, in the heart of summer, I couldn't find a single red wasp where there used to be hundreds.
I have a fallow field, and in perhaps two hours of dedicated observation I've got about 10 species of insect I need to identify, and for a couple of them I'm not even sure what kind of bug they are (I'm probably going to have to scan a field guide).
The lot is between the river and our local garden district. I suspect I'm part of a migration route between them (I figured I was too far from the river for dragonflies, but I see at least 2 a day) It's changing my plans for the space a bit.
Would highly suggest checking out the iNaturalist app. It doesn't always nail down insects/plants/etc, but a lot of the times it gives you a good guess and other, more experienced people will come along and give a better id.
