Annotated List 53 
species is being replaced by the less conspicuous PB. 
platypterus. 
79. Buteo lineatus lineatus Red-shouldered Hawk, 
“chicken hawk,” “hen hawk,” ‘mouse hawk.’’ Com- 
mon transient and less common winter resident. 
Our most abundant Hawk during fall migrations. 
There appears no authentic breeding records, though, 
as Dr. Stone points out, we are well within its breed- 
ing range. My Berwyn dates on autumnal arrival 
and vernal departure follow: 
Sept. 23 (1902)—Nov. 6 (1894); ave. 8 yrs. 
Oct. 16. 
Feb. 11 (1891)—Apr. 5 (1917); ave. 9 yrs. 
Mar. 14. 
80. Buteo platypterus platypterus Broad-winged 
Hawk, “chicken hawk,” “broad-wing.” Common 
summer resident. Michener, Warren, Pennock and 
Montgomery, all consider it resident, but there ap- 
pear to be no winter dates and it has yet to appear 
in the local Christmas census. ‘This species, former- 
ly quite rare, is now gradually supplanting B.bore- 
alis, but owing to its inconspicuous presence, my 
Berwyn migration records of its departure are few: 
Arrival—Mar. 20 (1896)—May 6 (1904) ; ave. 
14 yrs. Apr. 21. 
Departure—Sept. 6 (1903)—Oct. 10 (1908) ; 
ave. 3 yrs. Sept. 21. 
- Nest with eggs was found by Phillips at Avon- 
dale, Apr. 26, 1869 (F. and S., vi, 84), and with 
increasing frequency by Matlack, Price, Warren, 
Everett, Darlington, Jackson, Baugh, Ladd, Sharp- 
les, Pennock and Burns, principally on the Chester 
