The forerunners of the hosts
of migrating Chimney Swift arrive between the 11th and 18th of
April. Some exceptionally early dates are: April 8,
1900, March 20, 1903, March 30, 1913, and March 15, 1913.
southward moving flocks pass from late in August to early
October. During this period the Swifts resort to common
roosts and may be seen circling in immense funnel-shaped flocks
over large chimneys and about towers, such as several of the
public school buildings, the Calvary Baptist Church and the old
power-house stack at 8th Street and Woodland.