I wrote the entire DC section in Claudia Wilds' "Finding Birds in the National Capital Area." The areas described as the best for shorebirds are still the "best", although certainly Hains Point has deteriorated somewhat. It probably now requires a hurricane to "restore" it. The hydrilla between National Airport and Alexandria is where it all happens. Over the years we have had all the shorebirds on the DC list there except Woodcock, Piping Plover, Knot, and Buff-breasted. The hydrilla does require patience for the right tide and viewing conditions, and a good scope. It peaks in September. Dave