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 -- You received this message because you are subscribed to the Google Groups "Colorado Birds" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/cobirds/ee528b30-a51c-47fd-9bc0-0bc0651d8695%40googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
