252 GEOLOGICAL SURVEY OF CANADA. 



on the plains of the Saskatchewan, and at York Factory, Hudson 

 bay, between lat. 53° and 57°. {Richardson.) This species is far 

 outnumbered at London, Ont., by the red-shouldered hawk. More 

 common in the more remote districts. (W. E. Saunders.) 



Breeding Notes. — This is a rare bird along the St. Lawrence. 

 In eleven years I am only certain of having seen one specimen. 

 In the counties of Lanark and Renfrew it is common, and I used 

 to see it every year. It breeds within a few miles of the village of 

 Renfrew and sparingly near Sharbot lake. {Rev. C. J. Young.) 

 The red-tail breeds in scattered pairs about one to four of the red- 

 shouldered. It nests a httle earher and lays two to three eggs. 

 (yV. E. Saunders.) This bird breeds in Welland county and through- 

 out southern Ontario. {W. Raine.) On May 31st, 1891, I took a 

 nest of this near Indian Head, Sask. The nest contained three eggs 

 and was built of sticks in a dead poplar {Populus tremuloides) about 

 thirty feet from the ground. This species feeds chiefly on gophers 

 and mice. {Spreadborough.) 



337a. Krider Hawk. 



Buteo borealis kriderii Hoopes. 1873. 



High central plains of the United States and probably adjoining 

 British provinces. {Coues.) A young bird taken near there, was 

 seen in a taxidermist's shop in Maple Creek, Sask. Bishop thought 

 it was nearer calurus than kriderii. {A.C.Bent.) A careful exami- 

 nation of a specimen collected at Edmonton, Alta., by Spread- 

 borough shows it to be this form, and his notes on the breeding 

 of the red-tailed hawk at Edmonton which were given under borealis 

 in the first edition of this catalogue are now placed under kriderii. 

 It is more than probable that many of the prairie references given 

 under borealis should go here. 



Breeding Notes. — ^At Edmonton, on the North Saskatchewan, 

 in 1897, I observed a number of nests mostly along the river and 

 small streams. These were nearly always in cottonwood trees 

 {Populus balsamifera) but I think it is on account of these trees 

 having large branches near the top that they seem to prefer them 

 than from any other cause, as I also observed a few in poplar trees 

 {Populus tremuloides) where the branches were suitable for them 



