The scene may puzzle casual passers-by: people in lawn chairs staring at a chimney. Just wait; right around sunset the show begins.
That's when big numbers of Vaux's swifts--birds--come back to the chimney to roost for the night. The birds put on shows in several communities in the region this time of year, Hedrick Middle School in Medford is one site.
Carol Mockridge from RV Audubon and Karen Hussey from SOLC visit the studio, Medford Schools facilities manager Ron Havniear joins on the phone.