On November 3, 2009, I heard two double knocks and obtained two interesting videos from 87 feet up in Tree 8, which provides the view in the photo above. The videos show flights and markings consistent with ivorybill, but it is possible that some of the apparent white markings are due to solar glare. The bird that flies toward the camera in this clip (movie plays at full speed) flaps its wings like a woodpecker, has rapid flaps consistent with ivorybill, and appears to have lots of white on the wings and back. A discussion of this clip is provided here. The bird in this clip (movie plays at full speed) appears to have prominent white patches on the wings and glides in a way that is consistent with ivorybill. A discussion of this clip is provided here.