Extraordinary Size and Survival of American Black Duck, Anas rubripes, Broods

Jerry R. Longcore, Daniel G. McAuley

Abstract


Two female American Black Ducks (Anas rubripes) were initially observed during June 1982 with 20 Class Ib or 18-22 Class Ia-b ducklings in two wetlands in Hancock County, Cherryfield, Maine. Fifteen of 20 ducklings (75%) in one brood and 16 of 18-22 ducklings (72-89%) in the other brood survived to fledge. These large broods probably resulted from post-hatch brood amalgamation.

Keywords


American Black Duck; Anas rubripes; brood size; duckling survival; post-hatch brood amalgamation; Maine

Full Text:

PDF


DOI: http://dx.doi.org/10.22621/cfn.v118i1.897



Volumes that are more than six years old are freely available courtesy of the Biodiversity Heritage Library.

 


Questions or problems with the website? Contact William Halliday (info -at- canadianfieldnaturalist -dot- ca).