1947 



Friedmann, H. 1947. Geographic variations of the Black-bellied, Fulvous, and 

 White-faced tree ducks. Condor 49: 189-195. 



Haverschmidt , F. 1947. Field notes on the Black-bellied Tree Duck in Dutch 

 Guiana. Wilson Bull. 59: 209. 



1945 



Vorhies, C. 1945. Black-bellied Tree Ducks in Arizona. Condor 47: 82. 



1931 



Mover, J. W. 1931. Black-bellied and Fulvous tree ducks in Illinois. Auk 

 48: 258. 



1914 



Bryant, H. 1914. Occurrence of Black-bellied Tree Ducks in California. 

 Condor 16: 94. 



1906 



Brown, H. 1906. The Water Turkey and Tree Ducks near Tucson, Arizona. Auk 

 23: 217-218. 



37 



