Unfortunately, it's not a crop, I cut off the wing tip in taking the photo. Too bad, because otherwise it would be one of the best shots I've ever made.
Could you please explain what you mean by the white lines?
it would be better to shoot during the golden hours, but I only had 1 day to shoot, so needed to use all available time.
That's ok Arthur, don't take me wrong... we shoot when we can, that's it...
Shooting birds, like everything else, takes time and practice. Did I say practice? The most striking thing that I learn with Morris (the other Arthur

was how little I was rejecting photos. When I asked him how did he manage to do such great photos we showed me two huge piles of rejected slides... yep, it was still the slide era, and were two really huge piles of them.
So continue practicing and don't worry, just enjoy as you get them.
By white lines, I mean jpeg artifacts due to sharpening. Look at the legs of your 1st bird. Don't you see white lines contouring them? Those should never appear.