64 The Ornithology of Chester County 
110. Archilochus colubris Ruby-throated Hum- 
mingbird, “hummingbird.” Tolerable common 
summer resident. Nest and two eggs, Berwyn, June 
10, 1899. Also Berwyn migration data: 
Arrives—May 11 (1886)—May 22 (1917); 
ave. 17 yrs. May 15. 
Departs—Aug. 24 (1913)—Oct. 9 (1887) ; ave. 
17 yrs. Sept. 5. 
111. Tyrannus tyranus Kingbird, “beebird,” 
“kingbird,” “tweet,” “tyrant flycatcher.” ‘Tolerable 
common summer resident. My Berwyn migration 
data may average a few days later than that of the 
southern parts of the county. 
Arrival—Apr. 20 (1895)—May 20 (1917); 
ave. 18 yrs. May 5. 
Common—Apr. 25 (1895)—May 27 (1917); 
ave. 10 yrs. May to. 
Departure—Aug. 24 (1905)—Sept. 10 (1904) ; 
ave. II yrs. Sept. 2. 
112. Myiarchus crinitus Crested Flycatcher, “fly- 
catcher,’ “great-crest,” “snake bird.” Common 
summer resident. Nesting data: Berwyn, June 4, 
1893, five eggs. 
Berwyn: 
Arrival—Apr. 17 (1913)—May 8 (1909) ; ave. 
26 yrs. May 1. 
Common—Apr. 19 (1894)—May 19 (1913); 
ave. 22 yrs. May 9. ) 
Departure—Aug. 29 (1902)—Oct. 7 (1895- 
1897); ave. 13 yrs. Sept. 15. 
113. Sayornis phabe Phoebe, “beambird,” 
“bridgebird,” ‘‘phoebebird,”’ ‘“pewee,”’  ‘“pewit.” 
