Hooded Mergansers (Lophodytes cucullatus) Use Nest Boxes Designed for Wood Ducks (Aix sponsa): A Changing Demographic

H W Heusmann; Jason T. Stolarski

doi:10.1676/16-098.1

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H W Heusmann,^*,** Jason T. Stolarski^**

^*Corresponding author; e-mail: h.heusmann@state.ma.us
^**Massachusetts Division of Fisheries and Wildlife, One Rabbit Hill Road, Westborough, MA 01581, USA.

Abstract

Increasing populations of Hooded Mergansers (Lophodytes cucullatus) (Heusmann et. al 2000) may be out-competing Wood Ducks (Aix sponsa) for nest boxes on some sites in Massachusetts. Hooded Mergansers' use increased from ≤2% of boxes in 1979 to 25% by 2013, while Wood Ducks' use increased from an average of 22% in 1979 to a peak of 65% by the mid-1990s and has since declined to 57%. We estimate that Hooded Mergansers may be important nest competitors on 13 of 51 study sites.

Citation Download Citation

H W Heusmann and Jason T. Stolarski "Hooded Mergansers (Lophodytes cucullatus) Use Nest Boxes Designed for Wood Ducks (Aix sponsa): A Changing Demographic," The Wilson Journal of Ornithology 129(3), 644-651, (1 September 2017). https://doi.org/10.1676/16-098.1

Received: 15 June 2016; Accepted: 1 October 2016; Published: 1 September 2017

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