A few weeks ago, I mentioned a chimney in Northern Virginia that is good for Chimney Swifts in the fall. Last night, I watched an incredible flock of them go to roost. I would estimate something on the order of a thousand. To get to this location, take the Gallows Rd. exit and go outside the Beltway for about a mile. Just after you cross the intersection with Rte. 50, you will see the large chimney on the left at a school. I would arrive by 7:00. There was a lot of action at about 7:15 last night. All the birds were in the chimney by 7:30. It is interesting to get there early and watch the birds come in from all directions and assemble around the chimney. Mike Collins Annandale, Virginia collins@ram.nrl.navy.mil