Coverup by Mark Berquist
Via Flickr:
Nikon F3 | 35mm f/1.4 | Ultrafine/Diafine

Tough Guy
I found this sandhill crane in the spring 2011, in the valley south of Reservoir Lake. First he would drag his wing tips on the ground, then get in a tight ball and ram his bill into the ground. It was quite the scene to photograph. Later I found out it was taking an aggressive posture, letting me know that it was one tough bird and I had better watch my step.
Nikon D80, Aperture Priority, Sigma 150-500mm OS, F/6.3, ISO-400, ET 1/1000, Focal Length 500mm, Handheld Optical Stabilization on