I saw a Cackling Goose in a large flock (500+) of Canada Geese at the
Patuxent River Park (the geese were mostly on the Anne Arundel Side)
yesterday afternoon.  I viewed them from the PG side.

-- 
John B. Churchill
Frostburg, MD
http://www.jbchurchill.com/
http://www.westernmdbirding.com/