One of the things I have a real problem ID-ing is dragonflies. It doesn't seem to matter how long I spend looking at them in my photos and then online I can't ever seem to get a definitive match! PS -The other one is fungi (and a mis-identified mushroom is not good news so I now don't even bother trying!)
This time of year when the rest of nature is quietening down before the rush of autumn, the bugs, and especially the dragonflies, are the obvious wildlife to photograph. Get the timing right and they will be basking on a fence post or twig, soaking up the rays.