[cobirds] Re: Boulder Wren

Steve, interesting discussion, and I concur with the visual impressions.  I'll let others comment on the calls.

My online reading suggests that at the time of the Winter-Pacific Wren split, no evidence of hybridization had been found, even though the birds shared breeding grounds.  Is there more recent evidence of hybridization?  Or should we invoke the "absence of evidence is not evidence of absence" argument?

David Dowell

Longmont, CO

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