U. S. NATIONAL MUSEUM 



BULLETIN 170 PLATE 40 



Delta. Manitoba, May 23, 1927. 



A. B. Gresham. 



Large downv yount 



2j : -* I 





» w v#fc*. 



Marthas Vineyard, Mass., May 25, 1899. 



Young in juvenal plumage. 

 Short-eared Owls. 



O. Diirfee. 



