From 2 years ago. A Common Goldeneye (Bucephala clangula).
Wonderful! Goldeneyes are so handsome, but I never manage to get close - round here, they stay away from people, bobbing out of reach in the middle of lakes
And given how fast ducks fly, getting a shot like that is doubly impressive
I find larger birds quite easy to shoot in flight - if they're within decent reach - since they are rather predictable in the way they fly. As far as a I can remember, with this Goldeneye I could hear him taking off, and I just stood looking at the reeds to see where/if he should pop up, and found him flying in a smooth circle around me. Aimed and shot as I was spinning around and it turned out ok with the suns direction, clean sky as background and so forth.
I have a few spots where I can get fairly close to various birds without disrupting them. Equipped with 97-98% patience, and some 2-3% luck there have to be some keepers.
Don't give up, you'll get yours!