1949 



Engeling, G. A. 1949. The Mottled Duck — a determined nester. Texas Game Fish 

 7: 6-7, 19. 



1947 



Bailey, A. M. 1947. Black and Mottled ducks in Colorado. Condor 49: 209. 



1924 



Henderson, J. 1924. Status of the Black and Mottled ducks in Colorado. Auk 

 41: 471. 



210 



