This is another of the many images taken at the alligator farm in Saint Augustine, Florida earlier this year. The sunlight passing through the wings delineates the egret's feathers, making it easy to separate and count the different types. Here you can see primaries, secondaries, tertiaries, and greater and lesser coverts through the former. Note the wing bones that are visible through feathers and skin. What a wondrous marvel.
Nikon D800, Nikkor 500mm f/4, 1/2500 second @ f/8