Some goods signs of spring migration at Great Falls Park this morning. Fairly large flocks of Yellow-rumped Warblers included a good number of Palm Warblers--also had single sightings of Louisiana Waterthrush, Parula Warbler, and Ruby-crowned Kinglet. Small flocks of Tree and Rough-winged Swallows and Chimney Swifts were over the Potomac. A noon time walk through the meadow at River Bend was uneventful, but a walk along the river at River Bend was breathtaking with the Va. Bluebells, Spring Beauty, Toothworts, Star Chickweed, etc., in splendid display. Ralph Wall Great Falls, Va.