APPENDIX. 469 



Sparrow-Hawk. Falco sparverius. 

 Abundant. Resident. 



Fish-Hawk. Pandion halicctus. 

 Abundant. Migratory. 



Swallow-tailed Hawk. Nauclerus furcatus. 



I saw a specimen of this hawk in November, 1883. " Has been 

 seen once or twice in Pennsylvania. Mr. John Krider shot one near 

 Philadelphia in 1857 " (Turnbull). 



Mississippi Kite. Ictinia subcwrulea. 



Specimens of this hawk have been killed in Mercer County 

 during the past ten years. It is, however, exceedingly rare. 



Marsh-Hawk. Circus Hudsonius. 



Common during the winter, but less so during the rest of the 

 year. 



Goshawk. Astur atricapillus. 

 Rare, and seen during the winter only. 



Sharp-shinned Hawk. Accipiter fuscus. 

 Abundant. Resident. 



Cooper's Hawk. Accipiter Cooperi. 

 Abundant. Resident. 



Hen-Hawk. Buteo lorealis. 



Common. " Much more frequent in autumn and winter ; haunt- 

 ing meadows and cultivated districts " (Turnbull). 



Winter-Falcon. Buteo lineatus. 

 Not as abundant as the preceding. 



Broad-winged Hawk. Buteo Pennsylvanicus. 



" Rare. This hawk is also more frequently seen in winter." 



Rough-legged Buzzard. Archibuteo lagopus. 



Common ; particularly during the winter. Dr. Turnbull refers 

 to this bird, when it has acquired the melanistic plumage, as a dis- 

 tinct species Archibuteo Sancti Johannis. The plumage varies 

 from dirty white to black. 



