/ ^ 



BIRD MIGRATION 



/. 



Mississippi Yalley, 



W. W. COOKE and OTTO WIDMAN. 



HEAD BEFORE THE 



RID GWAT ORNITHOL O Gl CAL CL UB, 



^^J-■ i. 



November S, 1SS3. - ' S ^- ^ 



PUBLISHED IN THE "AMERICAN FIELD" 

 Vol. XX, Xo. 22, to Vol. XXI, No. 3. 



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