Bird of prey wing patterns (1 Viewer)

[Krispo]

I saw a bird of prey today with a strange wing pattern it looked a little bit like a buzzard's wing pattern, but with the colours reversed. does anyone know of a website where i can view illustrations of underwing patterns of BOP's? unfortunately, i am not at home at the moment so do not have a bird guide to hand.

Thanks

Kris

Edit: I think it was probably an escape, would still like to know what though. i think it had a pale body, but dark head.