This picture is not well-enough focused to be pleasing to the eye, but I post it because it shows an unusual feature of the species, as described in the Birds of North America entry: "Chick has a 1- to 1.5-mm-long spur on alula (wing) that permits grasping when chick climbs emergent vegetation, enters nest, or clings to submerged vegetation when swimming underwater." Detail at http://www.pbase.com/tgrey/image/81140678 .