Rob Hilton & I worked the Anacostia River this morning, and found some
decent birds:

Hains Point -
   Nothing, not even any Arctic Terns, let alone Anhingas

Anacostia River Park -
   2 subadult SURF SCOTERS near the second mudflat (when coming up the
river)

Kenilworth Park -
   1 VESPER SPARROW in the short grass field, with many SAVANNAHS and 3
FIELDS
   45 AMERICAN PIPITS, 2 flocks flying over
   4 HORNED LARKS, flushed from short grass
   1 NORTHER HARRIER
   1 MERLIN
   1 BARRED OWL, calling from woods between KAG and the school
   1 MARSH WREN, calling from the KAG marshes
   10 BLUE-WINGED TEAL, on the water at KAG
   4 COMMON LOONS, flying downriver
   1 GREATER YELLOWLEGS, flyover

Kenilworth Aquatic Garden (KAG)
   1 SOLITARY SANDPIPER

Not a whole lot of Neotropic passerines, just YELLOW and YELLOW-RUMPED
WARBLERS plus COMMON YELLOWTHROATS at KAG.

Probably missed a few other birds of note. 

Good birding,
Paul Pisano
Arlington, VA