9 
Buteo Oxypterus —Cassin. 
Sharp-winged Hawk. 
This Hawk was many years ago, and is now 
very plenty in Iowa. I think it is a variety of the 
Broad Wing, being found in company with them, 
and having habits much the same. It feeds on 
gophers, mice, squirrels, frogs and lizards. 
Archibuteo Lagopus —Gray. 
Rough-legged Hawk. 
It was many years ago one of the most 
abundant of the hawk tribe that we had in the 
neighborhood of Philadelphia. I have counted 
as many as twenty at one time in the meadows 
below the city, but now you can scarcely see one. 
The railroads running night and day has driven 
them to some more remote place. I have never 
found its nest, but have the eggs collected in the 
fur countries. I have met with it in Iowa and 
along the Mississippi ; it feeds mostly on meadow 
mice and gophers. 
Archibutco Sancti-Fohannts — Gray. 
Black Hawk. 
It is considered by some collectors a very rare 
bird. I have found it the same as most of hawks. 
It is more plenty some seasons than others. 
I have seen as many as ten at one time in the 
meadows below the City of Philadelphia, and 
have obtained eightin one season. They appear 
about October and leave in March; I have found 
