Wow, Carlo! It's hard enough to photograph one dragonfly in flight, but to get two of them interacting is pretty special! Nice use of the 500 mm "macro." Good exposure and excellent background. Nice sharpness on the male (red) and I don't mind the softness of the female. In an ideal world, I would wish that the female's wing wasn't partially covering the male's face, but there wasn't anything you could have done - and it's a minor point. Overall, this is very well done!