Re: Problematic ID Lincoln's Sparrow at Pacific Commons 2021-03-04
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That is a Swamp Sparrow, the really rusty wings, bold triangular post ocular, and lack of crisp streaking below seal the ID. The two species are very similar as juveniles, but that only lasts for a very short time after fledging. At this time of year they are readily separable. Nice find!
From: EBB-Sightings@groups.io <EBB-Sightings@groups.io> On Behalf Of David Yeamans
Sent: Thursday, March 4, 2021 6:51 PM
Subject: [EBB-Sightings] Problematic ID Lincoln's Sparrow at Pacific Commons 2021-03-04
In this checklist https://ebird.org/checklist/S82749997 I included two photos of a sparrow I have called Lincoln's sparrow. It could be mistaken for a swamp sparrow given that Sibley says the two as immatures are nearly indistinguishable from one another. The other option I considered and rejected was white-throated sparrow. I'm seeking opinions. Offline responses are welcome.