10,000 Birds
SEPTEMBER 9, 2014
is going to have to go to Michigan or Wisconsin. That is a big difference compared to the 2,000+ singing males detected in 2012, well above the recovery goal for this species set by the U.S. The most notorious effect is that their eggshells become so thin that a parent bird will crush it’s eggs while attempting to incubate them.
10,000 Birds
JUNE 7, 2012
Recently it has also been documented as breeding in Wisconsin, Ontario, and the Upper Michigan Peninsula, but those birds are few and not always accessible. Jackson, 2012. A nest wasn’t found until 1903, which set off a craze for Kirtland’s Warbler skins, nests, and eggs. The University of Michigan Press, 2012.
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