Respectfully, I'd like to point out to @AESthat size is one of the hardest things to judge in the field, and sometimes hard to judge in photos too. Don't get discouraged if you're repeatedly reminded of that fact on the forums. Size is easy to misjudge and it happens to ALL of us, and I suspect that it's because it has happened to ALL of us, that many of us will repeatedly emphasize the difficulty of estimating a bird's size. Don't take it personally or get discouraged if people point out that, contrary to popular belief, size DOES matter, but it's hard to judge. ?
Welcome to the forums AES. ?