Mute Swans on the Detroit River

Mute Swans (Cygnus olor) are not native to North America, and can present problems in some areas due to their large appetites and seasonal aggression. Michigan has the largest population of Mute Swans in the U.S. outside the Atlantic  seaboard. In 2009-2010, the Rouge River Bird Observatory was awarded grants from the Friends of the Detroit River to produce an ecological review of Mute Swans and conduct winter surveys of the numbers of swans spending the winter on the lower Detroit River.

Mute Swans and other waterfowl, mostly Canvasbacks, on the Detroit River. Photo by Darrin O'Brien.

A copy of the report (pdf) is available via the Friends of the Detroit River web site.

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