A 2,000 Km Genetic Wake Yields Evidence For Northern Glacial Refugia And Hybrid Zone Movement In A Pair Of Songbirds

Hermit and Townsend’s warblers are small songbirds that interbreed where their ranges overlap in Washington and Oregon. But researchers at the University of Washington recently uncovered evidence that over time the more aggressive Townsend’s has driven this hybrid zone far to the south, replacing the hermit across over a thousand kilometers of its former range.

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Filed under: Biology on November 7th, 2008