UNIVERSITY OF COLORADO BULLETIN 



Vol. XIII, No. 4. 



Published Monthly by the Regents of the University of Colorado. 

 Entered at the Post Office, Boulder, Colorado, as second-class mail matter. 



THE PRACTICAL VALUE OF BIRDS 



BY 



JUNIUS HENDERSON 

 Professor of Natural History and Curator of the Museum 



BOULDER. COLORADO, APRIL. 1913 



UNIVERSITY EXTENSION DIVISION 



General Series No. 7 

 Natural History Series No. I 



