Really pretty shot, Bobby! It's a little bright on the underside but that's just me being picky. I'd be happy to have taken this shot!
Greater and Lesser Yellowlegs are difficult to tell apart. The best identifying procedure is the length of the bill relative to the width of the head. In this case, measuring it on my monitor, the bill's length is almost twice the width of the bird's head. That would seem to indicate a Greater Yellowlegs. In the Lesser, the bill is approximately as long as the head is wide. Phew.