ECOLOGY OP ISLE ROYALB. 351 



25. Palco cohimharins (357). Pigeon Hawk. 



Eange: The whole of North America south to the West Indies and 

 South America. Breeds chiefly north of the United States. 



Stations: Trail to Sisljowit Lake, V, 4. 



Washington Harbor, clearing, I, '04. 



Resident: July 20. 



Migrant: August 5 to September 16. 



The little Pigeon Hawk was rather rare here, but became more com- 

 mon d\iring the fall migration. On July 20 one was seen near the head 

 of Tobin Harbor pursuing a Bald Eagle. It was seen several times 

 annoying these great birds at Rock Harbor and Siskowit Bay. 



Breeding Notes: A young male was taken August 6 near our camp 

 at Siskowit. Its cry closely resembled that of a Flicker. 



I saw this species at Washington Harbor on August 5, 6, and 7 and 

 again on the 23rd. After that it was occasionally seen, usually along 

 the border of the road and clearings, until September 16, when the last 

 specimen was taken. The only time when they occurred in appreciable 

 numbers was during the large wave of September 12. At this time flocks 

 of 6 or 8 were quite common and must have caused considerable damage 

 to the warblers and sparrows on which they seemed to be feeding en- 

 tirely. 



Like the other small hawks, they preferred the border of clearings biit 

 were not as often seen far away from the forest as were the Sharp-shin- 

 ned and Sparrow Hawks. Places where the forest had been cleared away 

 and had not yet grown up to alders and birches, seemed to be the favorite . 

 haunt, but some were found in the heavy balsam forest where the other 

 hawks just spoken of rarely ventured. 



26. Falco sparverius (360) . American Sparrow Hawk. 



Range: North America east of the Rocky Mountains, and from Great 

 Slave Lake south to Northern South America. 



Stations : Spruce and Balsam Forest, I, 2-3. Partial clearing, I, 1. 

 Clearing along Benson Brook, II, 1. 

 * Rock Ridge Clearing, II, 3. Forest, V, 4. 

 Washington Harbor clearing, I, '04, II, '04, X, '04. 



Breeding: No nests were found but immature specimens were seen 

 throughout July, August and September. 



Migration: About August 1 until after September 21. 



The Sparrow Hawk was not very common at Rock Harbor and was 

 not often seen at Siskowit Bay. But at Washington Harbor they were 

 very abundant and during the first part of the season considerably out- 

 numbered all other species of raptores. They frequented the clearings, 

 feasting on the swarms of grasshoppers which everywhere infested the 

 open. The stumps at the edge of the first clearing were fairly covered 

 with the legs and wings of these insects which had been pulled off before 

 the bird would swallow them. 



27. Pandion haliaettis carolineiisis (364). American Ospre;^. 

 Range: North America from Hudson Bay and Alaska, south to the 



West Indies and northern South America. Breeds throughout its North 

 American range. 

 Stations : Rock Harbor, I, 1. Siskowit Lake, V, 6. 

 Washington Harbor, X, '04. 



