BIRD STUDY NUMBER 



PPIJE-5T0DY REVIEW 



% Devoted to Elementary Science in the Schools 



Vol. 16 No. 4 APRIL, 1920 Whole No. 135 



One year (nine issues) $1.00. 15c per copy 

 OFFICIAL ORGAN OF THE 



American Nature-Study Society 



Photographed by Dr. R. W. Shufeldt 



The Black Skimmer 



A drawing by Audubon 



