Just as Tom was about to go out and check the post today, we have external mailboxes here, of course, though ours is only a step from the house, and our regular posties tend to wait for us to come out and hand the mail over, there was an enormous thump on the window which made us nearly jump out of our skins. It was not one but two squabbling cock chaffinches, so absorbed in their quarrel they forgot to look where they were going. One of them landed, punch drunk, on the fence post outside the window. At first, he was very wonky, his sides heaving, so knowing that having time to recover from shocks like this can make the difference between life and death for small birds, we waited for him to fly off at his leisure, before going out for the post.
From box elder