Swifts in the morning

Jim Felley (IRMSS668@SIVM.SI.EDU)
Mon, 28 Sep 98 09:53:47 EDT 

At the University of Oklahoma, Norman, OK, Chimney Swifts in the Fall
congregated in a tall chimney at the northeast corner of the campus
(perhaps they still do, this was in the late '70's).
   They emerged before dawn, in darkness that was barely tinged with
light.  From what I could see (not much), they formed a diffuse
cloud around the chimney.  I could not detect any funnel-like
movement of the cloud.
   By the time there was light enough for me to see, they had
dispersed.

                        Jim

                        Jim Felley
                        Smithsonian Institution
                        irmss668@sivm.si.edu