I see there are some experts here, thank goodness! We had a dragonfly overnighting on our rose bush in east end TO. It was very large-- heavy front end, wingspan and body length both exceeding the size of my palm/ the span of the large, fully opened rose on which it was resting. It had a pale green body and clear wings (no spots, just the usual webbing pattern); the leading edge of the uppermost wings was a thin gold line.
I can try to post a pic, but it was taken on an iPhone and dusk was falling, so it it poor quality. Any thoughts appreciated!