38 Norman A. Wood 



This is a common species in all parts of the state. On June 29 a nest 

 containing five small young was found in a dry marsh in tall, coarse grass. 

 This is one of the most beneficial hawks, as it feeds principally on injurious 

 mammals, all kinds of mice and ground squirrels. 



114. Accipiter velox (Wilson). Sharp-shinned Hawk. 



CoTJES, 1878. p. 620; recognized on one occasion when a female was taken at 

 Mouse River, September 3, 1873. Warren, 1890, p. 348; a specimen from Fort 

 Buford, Williams County, taken September, 1887. Judd, 1917, p. 17; rare, two speci- 

 mens secured in 1895. 



No live birds were seen, but there is one from the Turtle Mountains 

 mounted in the Biological Station Museum at Devils Lake. The Williams 

 Collection contains one taken at Grafton, September 8, 1912, by Mr. Williams. 



115. Accipiter cooperi (Bonaparte). Cooper's Hawk. 



BendirE, 1892, p. 193; Cooper's hawk in the vicinity of Grand Forks, North 

 Dakota, occasionally nests on the ground according to George G. Cantwell. 



The Williams Collection contains a female Cooper's hawk taken at 

 Grafton, May 24, 1914, by Henry Williams. 



The species was not fully identified in the field, although a hawk seen at 

 a distance was recorded as Cooper's. 



116. Astiir atricapiUns atricapillus (Wilson). Goshawk. 



Judd, 1917, p. 17; have seen head and feathers of two shot in north end of 

 Towner County. 



A male in the Museum of Zoology Collection was taken January 21, 1917, 

 at Grafton, by H. V. Williams ; the Williams Collection has one taken at 

 Grafton, April 9, 1907; and there is a mounted bird without data in the 

 State Biological Station Museum. 



The species enters North Dakota in the fall, and some winter there, 

 according to Mr. Williams. It is one of the most injurious of all the hawks, 

 as it lives principally on game birds and mammals. 



117. Butco horcalis krideri Hoopes. Krider's Hawk. 



Judd, 1917, p. 17; common migrant and also breeds in the same region as the 

 red-tail, and probably types of both will be found intermingling and breeding. 



The Williams Collection contains a fine specimen taken at Grafton, Sep- 

 tember 6, 1909, by Mr. Williams. 



On August 23, 1920, I saw at short range a hawk which I was able to 

 identify as Krider's. This, like the red-tail, is mostly beneficial in its food 

 habits, feeding largely on injurious mammals. 



118. Buteo borealis calurns Cassin. Western Red-tail. 



CouESy 1878, p. 624; frequently observed in the west, but the only individual taken 

 was at Mouse River, September 14, 1873. Judd, 1917, p. 17; common migrant, breeds 

 in Turtle Mountains and in timber around Devils and Sweetwater lakes. 



The above note is given for the eastern form, and both that and the 

 western doubtless occur in the state. Several were shot in August, 1920, 



