Incredible series of photos as an osprey attacks a great blue heron. I know, right? American Bird Conservancy is trying to save an Arizona Hummingbird Landmark.
OK...I've seen a lot of weird birding things on the Internet...this is high on the list of weird. It's artistic, but it may not be safe for work for everyone, so careful following this link. Basically...it's butt birds.
Take Cornell Lab of Ornithology classes online--Be A Better Birder.