25 

 Sharpless, Stone, Woodward, Swayne, and Warren, while in 

 Delaware County, sets have been secured in the Crun Creek 

 Valley by Messrs. Jack, Harrower, and Mercur. 



331. Circus hudsonius (Linn.). Marsh Kawk. 



The Marsh Hawk, tho a comparatively common 

 transient and winter resident, is a very rare, tho probably 

 regular breeder in Pennsylvania. It undoubtedly nests in 

 the extensive swamps along the Susquehanna Fiver, but no 

 actual nests seem to have been found in this locality. 

 Dr, Warren, in his"Birds of Pennsylvania", cites it as an 

 apparently common breeder, but recent data establishes 

 conclusively the fact that it is now decidedly rare, and 

 several of KKXXMI&X Dr. Warren's breeding records seem to 

 be based on insufficient evidence. It is, apparently, 

 most frequently observed during the summer in the northern 

 tier of counties and has been recorded during that time 

 from Sullivan County (Stone and Behr), Center County 

 (Harlow), and Erie County (Simpson). It undoubtedly nests 

 in Crawford County, but the only nest actually found in the 

 state, of which I KKXM am able to find record, was taken on 

 May 31, 1911, on the Peninsula at Erie. 



332. Accipiter velox (Wils.). Sharp-shinned Hawk. 



This species was formerly a common bird thruout 



