Matt et al., Adding to Doug Robinson's comments below, my initial impression was that this bird seems both longer-winged and in particularly longer-tailed compared to Vaux's Swift. The combination of photos, what you describe, and the vocalizations that you heard provide a very compelling report. Chimney Swift has been on the "next bird to be added to the Oregon list" radar for many of us. Dave Irons > > Matt > > Very good. Only a matter of time that one was found with all the swift > watching nowadays. > > Tough to id swifts in silhouette but it can be done. Proportions look very > good for chimney and too long-winged for Vaux's relative to body length. Even > though more of a long shot, would be good to eliminate other tropical swifts. > Seems to be a Chaetura by shape and amount of head projection, but > white-chinned and spot-fronted swifts can appear very similar to chimneys in > silhouette. Swifts are super tough to nail down! Even great looks in good > light can leave lingering doubt. > > Cheers > Doug