Plumbeous Rail (Peru)

This guy was fun to photograph as he wandered around a high elevation marsh feeding.


http://img35.imageshack.us/img35/6985/e710.jpg


Camera Model: Canon EOS 7D
Shutter speed: 1/200 sec
Aperture: 5.6
Flash: On
ISO: 400
Lens: EF500mm f/4L IS USM

Thanks Glenn for the awesome photo.
I wonder what's the specie of the bird?