Tuesday, May 27, 2014

Tennessee Warbler

Here are five Tennessee Warblers feeding on one of John Holden’s jelly feeders. This spring, Erika and I have occasionally seen these warblers at our hummingbird feeder.

In a previous post, I explained why Tennessee Warblers might be better named Coffee Warblers. In any event, numbers of these warblers tend to fluctuate greatly from year to year. These fluctuations are probably due to the species' being a Spruce Budworm specialist. When budworms are abundant, Tennessee Warblers can be the most common bird in eastern Canadian boreal forests. Thirty-year censuses, however, indicate that Tennessee Warblers enjoy stabile populations over the long term (Rimmer and Mcfarland 2012).

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