These plain looking birds are transformed when they spread their wings, and you caught that perfectly. Agree with you about the bill, but that isn't a deal-breaker. Lovely image.
Nice one, Karl. I love that you can see the underwings so well. I agree with your own assessment about the beak merge but still a nice capture. I would consider adding a tad more canvas at the bottom for him to fly/land into and maybe a tad less on top.