Harris—Birds of the Kansas City Region. 277 
All three of these Nighthawks have been observed in Swope 
Park. 
CHORDEILES VIRGINIANUS SENNETTI Coues. Sennett’s Night- 
awk. 
Regular but not numerous migrant. 
See the remarks on the Western Nighthawk. 
Suborder Cypseli. Swifts. 
Family Micropopman. Swifts. 
Subfamily Chaeturinae. Spine-tailed Swifts. 
CHAETURA PELAGICA (Linn.). Chimney Swift. 
Very common summer resident. 
The forerunners of the hosts of migrating Chimney Swifts 
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. 
The 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 publie school buildings, the Calvary Baptist Church and the 
old power-house stack at 8th Street and Woodland. 
Suborder Trochili. Hummingbirds. 
Family Trocumipar. Hummingbirds. 
ARCHILOCHUS COLUBRIS (Linn.). Ruby-throated Humming- 
bird. 
Common summer resident. 
The early Hummingbirds arrive around April 27th, but are 
not found in numbers until a week or more later. They leave in 
October. 
The nest, a soft, delicate, cottony eup, decorated with lichens, 
ris of the wonders of avian architecture and is usually sad- 
ed on a small horizontal limb ten to fifty feet from the ground. 
It is often found in orchards. 
