44 Wyoming Birds. 



PAN DION I DAE (Ospreys). 



The Osprey lives almost entirely upon fish, which it captures 

 alive. If allowed to nest near the barnyard, the Osprey will keep 

 all hawks away. 



References : 



1. "Useful Birds and Their Protection," Massachusetts Board 



of Agriculture, 1913, p. 413. 



2. Hand Book of Birds of Eastern North America, by Chap- 



man, p. 307-308. 



364. Pandion haliaetus carolinensis: Osprey. 



Fairly common near the larger streams where fish are to be 

 had. 



STRIGIDAE (Horned Owls, etc.). 

 Almost all the Owls of the state are of economic importance. 

 They destroy large numbers of rodents. The Long-eared Owls of 

 the plains and foothills regions keep up a constant warfare on the 

 mice and other small mammals. The Great Horned Owl and its 

 sub-species are among the greatest enemies of rats and small ground 

 squirrels'. Most of the owls also feed upon insects and birds to 

 some extent. 



References : 



1. Biological Survey Bulletin No. 61. 



2. "Birds in Their Relation to Man,'' Weed and Dearborn, pp. 



195-204. 



365. Alucb pratinoola: Barn Owl. 



Accidental. One specimen reported by Mr. M. P. Skinner 

 from the Yellowstone Park. 



366. Asio wilson ianus: Long-eared Owl. 



Fairly common on the plains and into the mountain regions 

 in southern Wyoming.. Less common toward the northern 

 part of the state. 



367. Asio flammeus: Short-eared Owl. 



Apparently a rare owl in this state. The only recent rec- 

 ord's are from Richard, Peabody and Lockwood, all of 

 whom indicate that but few occur. 



