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Re: Del Mar birds of interest (and ID question – photo quiz)

Re: Del Mar birds of interest (and ID question – photo quiz)
By – 6:50 pm
On 7/10/2022 1:25 PM, David Trissel wrote:It is VERY slow out there. Thought I’d entice some folks with a photo quiz.While doing the San Dieguito monthly bird survey, JoAnne Kellogg and I found the only interesting species, the continuing Neotropic Cormorant on the wires at 7:00 this morning with 9 Double-crested Cormorants.Photo quiz: In addition, we had a bluebird that we initially assumed was an immature Western Bluebird. I’m curious if anyone can point to specific field marks that distinguish Western from Mountain in immature birds. The checklist with photos is here: https://ebird.org/checklist/S114790391I’m no expert on immature bluebirds, but a cursory glance at Sibley indicates that Mountain Bluebirds have slightly longer wings than the other two species. Looking at your photographs and comparing them with Sibley’s illustrations, it would appear to me that the bird in the photo is a Western Bluebird. However, an immature bird might not have fully-grown primaries, so I wouldn’t place much confidence in this conclusion.John WaltersBonita, CAjohnfwalters5552@…_._,_._,_