Greetings All

The Pacific Wren at Sawhill Ponds, Boulder... well... may not be. At least, in 
my opinion. I am sure others will disagree. The call is spot-on for Pacific, 
wrong for Winter, both by human ears and sonogram. However, the visual 
phenotype fits Winter Wren better, especially the heavy white spotting on wings 
and barring on back. I've shared photos of this bird with a couple nationally 
renowned birders who have expressed doubt as to its ID. As its call is that of 
a Pacific Wren, one wonders about a hybrid. The birds are in contact in that 
evil zone of species and subspecies mixing in NE BC and Alberta. As with other 
closely related species (eg, BH and Cassin's Vireo, RN and YB Sapsucker, 
Mourning and MacGillivray's Warbler) in that area, hybridization undoubtedly 
occurs, and we should be right in the line of those birds' migratory movements. 


In any case, I don't claim to know anything, but I would be wary of labelling 
this bird a Pacific Wren. I hold Ted Floyd, its finder, in great respect, and 
this is by no means an attempt to assault his exceptional birding skills and 
caution.


Best Wishes
Steven Mlodinow
Longmont, CO

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