Poor Vision, Great Eyes

For having such poor vision all my life, I've got some pretty good eyes!  As so often happens, I spot a bird or two perched atop the dead elm at the edge of our property.  Usually I have to zoom in and take a picture to upload on the computer before I know what it is.  Today, I spotted a tiny bird on the uppermost branch.  I figured I'd be learning a new bird, once I saw it up close--it never occurred to me that it would be a hummingbird.  I'm shocked that I even noticed it at that distance.