Barn Swallows on radar in Oregon
This morning (Sept. 4) I captured this image from the doppler radar when the spreading cloud of Barn Swallows (the green bubble in the center) was about to disperse throughout this part of the Willamette Valley. By now we know that they, or others like them, will reassemble in the same place and do this again tomorrow morning, and probably every morning into early October.
Bruce Cousens, a biologist watching this action from Vancouver Island in B.C., is hoping we might find migrating Purple Martins joining the roosting Barn Swallows. He also points out that there are several smaller "bubbles" of green visible briefly in the area near Forest Grove in Washington County about 30 miles north of the major flock in Yamhill County. I hope some birders in that area might begin watching "their" cornfields just before sunset. It would be interesting to know that there are other locations where this spectacle can be observed, and that these birds are not totally dependent on one location.