UNITED STATES DEPARTMENT OF AGRICULTURE 
BULLETIN No. 619 
Contribution from the Bureau of Biological Survey 
E. W. NELSON, Chief 
Washington, D. C, 
PROFESSIONAL PAPER 
March 8, 1918 
FOOD HABITS OF THE SWALLOWS 
A FAMILY OF VALUABLE NATIVE BIRDS 
By 
F. E. L. BEAL, Assistant Biologist 
Food Habits of the Swallows . 
Purple Martin , 
Cliff, or Eaves, Swallow . . . , 
Barn Swallow , 
Tree, or White-Bellied, Swallow 
CONTENTS 
Page 
1 
3 
6 
11 
15 
Page 
Violet-Green Swallow 19 
Bank Swallow 21 
Bough-Winged Swallow 25 
Tabular Summary 28 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1918 
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