In Carlos's Eagle Pass, the eagle is not a breathing, soaring eagle but a shape in the rock wall. Look to the center of the photo, where the wall of rock dips down from the left and then rises to the right. Picture in your mind that that small bump in the top of the wall is the top of the eagle's head and the wings are outspread, creating the walls on either side, with the body of the "bird" going straight down from the head. It's an optical illusion and a good eye on your part, Carlos.
If you've ever wanted to make a difference but found it hard to believe that one person could... check out the Kiva Team Caedes discussion thread and discover that anything is possible.