818 Capt. Blakiston on Birds collected and observed 
fortunate enough to procure eggs identified by specimens, which 
are white, more or less blotched with red. 
The white throat in conjunction with the dark breast is so 
marked a feature that this might well be called Swainson^s White- 
throated Buzzard. 
7. Buteo borealis. <$ No. 158. Kootsnay Pass, Rocky 
Mountains, August 21st, 1858. Male and female, killed on the 
15th of May, 1858, at the forks of Saskatchewan: had red tails. 
This bird utters a peculiar squealing cry very frequently. 
At the time of my ascending to a nest of this bird (of which, 
unfortunately, I have only one of the two eggs then taken re¬ 
maining), my partner, although the birds made continual sweeps 
near me, failed in killing either. I have, however, very little 
hesitation in pronouncing the bird to be the Red-tailed Hawk, 
and the same as that of which I have the tail and feet, and of 
which I saw numbers at the Red River Settlement in the spring 
of 1859. The cry is very peculiar, and caused me to give the 
bird, for the time, when 1 had no books of reference, the name 
of the Squealing Buzzard. 
8. Archibuteo lagopus. Although I saw numbers of this 
patchwork-looking bird, I never obtained a specimen. 
9. Archibuteo samcti-johannis. Head, feet, and wings 
preserved, and three eggs obtained by M. Bourgeau : wing 18 in. 
long. Saskatchewan Plains, summer of 1858. The eggs are 
white, with slight blotches of red: rather more spherical than 
those of A. ferrugineus . 
10. Archibuteo ferrugineus. $ No. 86. Between north 
and south branches of Saskatchewan River, April 30th, 1858. 
Length 26| in., wing 18g, tail 9^. Eye brown-hazel, feet and 
cere yellow, bill dark horn-colour. Remains of Ground-Squirrel 
in stomach. 
The eggs taken from the nest of No. 86 were four in number. 
The nest, which was placed in an aspen tree, 20 feet from the 
ground, was composed of sticks, 2§ feet across, and lined with 
buffalo wool. Those taken from another nest near the same 
