I managed to get a best score of 600 after a couple rounds
What I liked: The art was great and I liked hearing the bird noises as well, great atmosphere. I also liked the information index at the end.
What I think could be added or improved: Maybe some sort of indicator of what birds I've seen, though that would probably make it too easy. But some way to not click on already counted birds as much would be nice. Maybe you could make the binocular zoom part a bit faster. Minor complaint overall though. I'd also like to see Black-Billed Magpies and Canada Jays since those are my favourites :).
Thanks for the game!