62 The Ornithology of Chester County 
four eggs heavily incubated. Berwyn data on mi- 
gration. 
Arrives—Apr. 15 (1912)—May 6 (1905-1910) ; 
ave. 12 yrs., May 1. 
Departs—Oct. 9 (1899)—Nov. 12 (190I- 
1902.) ¢ ave. 9: yrs.; Oct: 25. 
105. Centurus carolinus Red-bellied Woodpecker. 
Rather rare winter visitant, mentioned by all our 
list-makers. Phillips found it at Kennett Square, 
Oct., 1871 (F. and S., vi, 148); two specimens 
were taken by Rhoads at Kimbleville, Jan. 1, 1880 
and Dec. 8, 1881 (Stone, Bds. E. Pa. and N. J., 
96); and Warren has taken three in ten winters 
CBs, Pal, 8G00;/ 074); 
106. Colaptes auratus luteus Northern Flicker, 
“flicker,” “golden-wing,”’ yellowhammer,” “yellow- 
shaft flicker.’”’ Common summer resident, occasional 
resident; the most abundant representative of its 
family. Nidification begins Apr. 15-25, average 
date for complete set May 26 (Burns, Mon. of the 
Flicker, Wils. Bull., No. 31). Migration at Ber- 
wyn: 
Arrival—Feb. 2 (1888)—Apr. 6 (1899) ; ave. 
27 ts., Mar..15. 
Common—Feb. 17 (1888)—Apr. 23 (1899); 
ave. 24 yrs., Mar. 23. 
Bulk—Sept. 13 (1899}—Oct. 19 (1893-1894) ; 
ave. 12 yrs., Oct. I. 
Last—Oct. 7 (1915)—Dec. 11 (1900) ; ave. 20 
Vrs. (Ock 29: 
107. Antrostomus vociferus vociferus Whip-poor- 
will, “whipper-will,” “whipper-ca-loo.” Not com- 
