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The Audubon’s Warbler (Dendroica coronata auduboni) is the western edition of the Yellow-rumped Warbler (Dendroica coronata).  The Myrtle Warbler (Dendroica coronata coronata), the eastern subspecies, and Audubon’s Warblers hybridize in the southern Canadian Rockies and on the basis of this evidence, as well as genetic similarities, these two species were combined into a single species in 1973 by [...]

The Butterbutt, or, more properly, the Yellow-rumped Warbler (Dendroica coronata) is one of the most common warblers in North America. The reason for their common name is pretty obvious, but if you need an explanation just look at the little thumbnail to the right. Here in the eastern part of the continent we have the [...]