Birds are often on camera, but rarely on the camera.
This photo of a pygmy nuthatch was an experiment by Ed Sweeney (Navicore on Flickr). Thanks to its Creative Commons license on Wikimedia Commons, I found the photo and learned of Ed Sweeney's extraordinary photographs. See more on his Flickr page here.
(photo by Ed Sweeney, on Wikimedia Commons. Click on the image to see the original and Creative Commons license.)