Today there were 2 Black Terns alternately loafing and feeding at Paper 
Mill Flats.

Also:
Killdeer - many
Both Yellowlegs (~40, though more Lessers than Greaters)
Solitary Sandpiper 4
Spotted Sandpiper 1
Semipalmated Sandpiper - many
Least Sandpiper - many
Pectoral Sandpiper 3
Stilt Sandpiper 2
Short-billed Dowitcher 1
Wilsons Snipe 1

It's facinating to watch the monster Snapping Turtles in the shallow 
water at the center of the flats - catching fish and warding each other 
away when they get too close

Cheers,
Steve Collins
Towson, MD