I spent far too long trying to get this. I had seen the wheeling gulls, the attractive autumn coloured trees and a dark threatening sky. But trying to tell the seagulls at which height and direction to fly, so they were against the foliage, proved extremely tricky.
I think one of two things needs to happen before I try this again. One, the seagulls need to learn English, or two, I need more language lessons from Dr. Doolittle.