598 ON THE NESTING OF CERTAIN HAWKS, ETC. 
frequently seen it this summer along the northern tributaries of 
Milk river, where I have secured some fine specimens of old at 
young, and observed its nidification. This is precisely the sam 
as that of Buteo Swainsoni, the nest which I found being placed 
on a little projection on the face of an earth bluff. It contained 
three young, about ready to take flight, July 18th. ue 
I was still more surprised to find yet a third species of hawk 
nesting in the same unusual manner. This was the peregrine : 
falcon or duck hawk (Falco communis), a bird whose nidification 
under varying circumstances, has occasioned some little con 
troversy, and entered into the discussion of the relationship of 
the American to the European form. I was much gratified hes 
cover the nest, which very few ornithologists have seem m 
country, and to note how readily the bird adapted itself to 
special surroundings. In this region the falcon may be bee. 
said to nest on the ground; yet we must remember that itis merely 
the replacing by an earthen embankment of the rocky crags W 7 
the bird is described as usually nesting. In effect the location $ 
the same. One of the two nests I found was almost within ie 
$ 
pS 
zard were respectively nesting. It was almost a burrow 12 
ground, so completely was it hidden on a little sh 
neath a projecting mass, and further concealed by à tall coma 
earth nearly washed away from the face of the bank. eos: 
contained three young ones, just able to fly. On lowering © 
down by a rope over the brow of the bank, they ne 
and circled about till two were shot ; one parent had agi? 
destroyed; the other was not seen. The third young one 
below the top. It likewise contained three young 
yet able to leave the nest. Both parents hovered Over 
loud harsh cries; the male kept at a respectful distant el 
her home, 
me at close range, till, at one of her swoops, I brought 
ground. I endeavored without success to lasso 
out of the nest; they repeatedly cleared themselves % 
just as it began to draw upon them; and as the crum 
