Cackling Geese (Branta hutchinsii hutchinsii)
Part of a small flock feeding with mid-sized Canada Geese (Branta canadensis) beside pond at Shawnee Mission Park, Johnson County, Kansas - November 8, 2004
Nikon Coolpix 4500 / Kowa TSN-824 82mm / 20-60x
All photos © 2004 David Seibel

See ID discussion at http://www.sibleyguides.com/canada_cackling.htm.