Three-way-hybrid American Wood Warbler Found in Pennsylvania
Please note that this is not an April Fool’s Day report.
I’ll say only than the hybrid’s mother seems to be a “Brewsters” Warbler, which is itself a hybrid between Blue-winged (Vermivora cyanoptera) and Golden-winged (Vermivora chrysoptera) Warblers. The father is a third species of warbler. Get out your field guide and read the fascinating article, including many photos, by GrrlScientist.
[Chuck Almdale]
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