Gadwall (Anas crecca)


Male Burp: Males give a low nasal raeaeb. Given either singly, in a series, or as part of the grunt-whistle display (Palmer 1976).



Gadwall male burp, May 13, 2012. Horicon Marsh, Dodge County, Wisconsin.


References


Palmer, R. S. 1976. Handbook of North American birds, Vol. 2: waterfowl (part 1). Yale Univ. Press, New Haven, CT.