Great quiz, although tough for us North American types. Need one for this side of the pond, I guess. Can you accept Northern Harrier for Circus cyaneus? (That's the official AOU common name over here.)
Is there a reason Goshawk isn't counted? I've always assumed they were native to the UK and have seen them here - so not sure whether their omission was an oversight or whether they're actually an introduced species or something :)
This quiz is not great at all, you're missing several UK birds of prey. Goshawk, white-tailed Eagle, red footed falcon, Montagu's harrier, honey buzzard, rough legged buzzard. This quiz really needs updating.
Previous quiz: British birds #2 : Other water birds