348 MICHIGAN SURVEY, 1908. 



female, about half moulted, was taken here on September 16. Its crop 

 contained seeds and berries with portions of grasshoppers and other 

 insects. The birds as a rule were very wary, and when approached 

 either took wing or ran swiftly through the long grass. Their flight 

 was swift and direct, accompanied by a whirr-ing noise as they arose. 

 During the fall they make local migrations and are reported to visit 

 the clearings of Washington Harbor in quite considerable numbers. 

 One was thought to have been seen here during the latter part of 

 August by Michael Hollinger, a hired man at the Club-house. 



17. Circus liuclsonius (331). Marsh Hawk. 



Range: Xorth America in general. Breeds throughout its ISTorth 

 American range. 



Stations : Eock Harbor, Tamarack and Spruce Swamp, II, 2, 5. 

 Washington Harbor, I '01. 



Resident: July 13 to September 12. 



On July 13 one of these birds was observed in a tamarack swamp at 

 the end of the island. At Washington Harbor a female was seen flying 

 over the clearing August 6, and again a female was found September 

 1 in a tamarack swamp on Washington Island. 



Two old males were seen together several times on September 8 and 

 again on the 12th in the trees bordering the first clearing, chasing 

 small birds, probably Savanna Sparrows. 



18. Accipiter vdox (332). Sharp-shinned Hawk. 



Range : North America in general. Breeds south to Panama through- 

 out its North American range. 



Stations : Spruce and Balsam Forest, I, 2-3 ; Forest, Y, 1. 



Washington Harbor, I '04 (clearing) ; Forest, II '01; Clear- 

 ing and Forest, X '04. 



Resident: July 26. 



Migration : Began about the first of August, continuing throughout 

 our stay. 



The Sharp-shinned Hawk was first seen July 26 at the western end 

 of Rock Harbor. Only one specimen, a fine male, was found at Siskowit 

 August 15, but at Washington Harbor it was rather common the first 

 of August, and so increased in numbers that during September it be- 

 came even more abundant than the Sparrow Hawk. 



The Sharp-shinned Hawk, more than any of the other raptorial birds, 

 timed their migration to that of the warblers and sparrows upon which 

 they preyed. During migration they increased gradually from day to 

 day, those which came in from the north remaining with those already 

 here instead of passing on to the south, probably because of the verj 

 favorable feeding grounds offered by the clearings. 



19. Accipiter cooperi (333). Cooper's Hawk. 



Range: North America from southern British America south to 

 southern Mexico. Breeds throughout its range. 



Stations : Rock Harbor, II, 2 ; Washington Harbor, I '04. 



Resident: July 18 to September 12. 



This was one of the rarest hawks on the island although food was 

 very abundant. It might be that the clearings were not extensive enough. 

 One was seen at Rock Harbor (I, 2) July 18. Also at Washington 

 on August 24, 29, 31 and September 12. On this last date several came 



