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

Authors

  • Jerry R. Longcore United States Geological Survey, Patuxent Wildlife Research Center-Orono, 5768 South Annex A, Orono, Maine 04469-5768
  • Daniel G. McAuley United States Geological Survey, Patuxent Wildlife Research Center-Orono, 5768 South Annex A, Orono, Maine 04469-5768

DOI:

https://doi.org/10.22621/cfn.v118i1.897

Keywords:

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

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.

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Issue

Vol. 118 No. 1 (2004)

Section

Notes

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