Swallows on radar

This morning the radar image of the flock of Barn Swallows leaving their nighttime roost shows a strong presence just east of Newberg, Oregon. Any birders in that vicinity at 6:30 a.m. should watch the sky in the coming days for swallows passing overhead. Or perhaps there are cornfields in the area (maybe just south across the Willamette River) that should be checked for swallows going to roost between 7:30 and 8:00 p.m.