Chimney Swifts returning to roost from SeEtta Moss on Vimeo. After finding out about this chimney in Harlingen, TX that hosts several hundred Chimney Swifts I had to go see it. I was not disappointed as I enjoyed watching hundreds of these birds converge near this large chimney, circling and chittering until they dive into the chimney to roost for the night. As they wait until almost dark to go to their roost it is best to watch this in full screen mode (click on 'vimeo' to enlarge). SeEtta