The Birds of Wyoming. 163 



upon various kinds of ground squirrels and young prairie dogs. 

 In nesting they select a place near water and build upon inac- 

 cessible pinnacles of rock or in the tops of scrubby pine trees. 

 Their nests are usually built of small sticks and lined with 

 grass. In the valley of Sand Creek, twenty miles south-west of 

 Lararnie, there is a nest built upon a pillar of sandstone that is 

 twenty-five or thirty feet above the ground. The nest stands 

 over four feet high and is three feet across at its base. This 

 has been occupied for many years by this species of hawk and 

 each season they add a little to its height. 



Jesurun reports them common at Douglas and Bond the 

 same at Cheyenne. Williston reports them from Lake Como- 

 I have taken them in the Big Horn Basin, Buffalo, Sundance, 

 Chugwater and on the Laramie Plains. There are two skins in 

 the collection and two nests of eggs. One was secured on April 

 30th and the other on May 9th. 



Total number of species and varieties of birds known to 

 have been taken in Wyoming up to date, 288. 



NOTE. 



Inadvertently I omitted to include the name of Mr. Merritt 

 Cary among those who have furnished valuable notes for this 

 bulletin, under "Acknowledgments," and take this opportunity 

 to thank him for his list that was taken at Newcastle. 



I also take pleasure in thanking Dr. A. K. Fisher of the 

 Department of Agriculture for valuable suggestions and aid 

 while this bulletin has been passing through the press. 



