I just returned from a weekend in Texas with my friend Alan Murphy. We photographed the fall raptor migration from a blind using techniques from Alan's excellent new ebook "The Photographer's Guide to Attracting Birds." Raptors are notoriously skittish, but with Alan's techniques we spent the weekend photographing them with a 300mm lens, sometimes inside our minimum focus distance! While a small distance to subject is great for bird portraits, it makes flight photography very challenging. Because the birds are so close (and such fast flyers) they move across your field of view very quickly, and because they were approaching from behind the blind you couldn't see them coming. Here's one of my favorites from our Sunday session. I applied some background cleanup to the image.
Canon 1D Mark IV, 300mm, f/4.5, 1/4000, ISO 400, manual exposure, hand held