While at DGCA I had several opportunities to photograph a Blackpoll Warbler. I made the most that I could out of those opportunities, but the results were not exceptional. Like most warblers, they were quite happy to flit about faster than I could keep up, picking insects off of leaves and branches.
I secretly suspect that they mocked me as they hopped about, moving just as they heard my camera beep-beep when it acquired focus. The joke is on them, however, because the focus was usually acquired on a nearby leaf or branch, not the bird. Ha! Who is laughing now, bouncy Blackpoll?