Birded the slope of Mt Hamilton above the boxwood collection at he US National Arboretum this afternoon for about an hour; very active feeding flock dominated by Dark-eyed Juncoes and Eastern Bluebirds. But among the flock were also my FOS Pine Warbler and FOS Eastern Phoebe. All were flycatching avidly for a strong flight of small gray moths (probably a bud-roller). Juncoes and bluebirds were very vocal.
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