I have just seen three geese go over the Audubon office in central DC 
unfortunately in silhouette and undidentifiable but there were two large 
and one much smaller bird.  I presume it was two Canadas & a Cackling.  the 
good nes is that they pitched in to the area roughly around the McMillan 
reservoir.  So if anyone can get out at lunchtime to take look it might be 
worth a try.

Good luck

Garu

PS For the unversed, where is Hunting Creek?