Thanks for playing! So sometimes focus can be a little tricky, especially if the bird is far away. When you take a picture, you'll see it say "Subjects in focus" and a score. You'll only complete the objective if: A) You're taking a picture of the right colour bird, B) the bird is currently in the right pose, and C) that bird is in focus (so Subjects in focus says 1). Sometimes, it can look like they are in focus but it still isn't within the acceptable focus range, so that's probably why you couldn't complete the objective.