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|| UNITED STATES DEPARTMENT OF AGRICULTURE | 
ae BULLETIN No. 862 
he a Contribution from the Bureau of Biological Survey 
‘ E. W. NELSON, Chief ; \ : 
| washington, D.C. PROFESSIONAL PAPER December 30, 1920 ie 
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FOOD HABITS OF SEVEN SPECIES OF |} 
AMERICAN SHOAL-WATER DUCKS sas 
By yy se < 
DOUGLAS C. MABBOTT, Assistant in Economic Ornithology ! 
< ee Z 
CONTENTS | 
| Page Page = zs 
Introduction . . . 1. 2 ss 2 eee 1 | Blue-winged Teal... . . . - . ss _ 22 ae 
Reeth de nee tive atishas ia rar tekie 2) CmnamonFeall.2 2 i.) a vvenreo ems « 28 ‘a 
PENAL) eevee 6 ch aes gies sirte!,« 1O7 Pinta ssa Sons stot rap iwtletvenite 31 age eR 
European Widgeon ... ...s: - 16 | Wood Duck... .)- « 2's « st 2e Sits Vaeeni 
Green-winged Teal . sates ies 4's 17 
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WASHINGTON - 
GOVERNMENT PRINTING OFFICE Ps 
; 1920 aes 
4 
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