Baby geese. I took a bunch of pictures of these guys, but few of them turned out good. I needed to stop down more than I did. f7.1 isn't enough to give me the depth of field that I needed. This isn't as sharp as I already know the lens is capable of, but it's one of the best ones I have.
Canon 100-400L lens test shots. University of Illinois at Urbana-Champaign campus