ID your dragon/damselflies
this site is beyond too cool! i have never seen one so thorough and well done. if you click seasonal, it gives you a page of all the species flight times and shortens your search based on time of year. if you click the arrows below the pic, there are waaaay more pics. if you look at the bottom to click here for map, well, you just need to do that! and you can narrow it down to your county!
Here is a link that might be useful: odonata central