US v UK Big Year
I enjoyed the movie although a lot of it was the unknown to me as set in North America of which I only know Florida. I read The Big Year years ago and also a UK-equivalent called Rivals & Arrivals.
Obviously the UK book was a toned down, or rather a scaled-down version of its US counterpart, we are, after all a tiny island.
Competitive birding or twitching is a fascinating subject and as much a study of human traits as our feathered friends.