Regards,
Mark Minner-Lee
Erie, CO
Sent from my iPhone
On Apr 11, 2021, at 3:14 PM, Adam Vesely <avesely22@gmail.com> wrote:
Mlodinow and Leukering (2018) wrote a fantastic and informative piece in Colorado Birds about identification of Western and Clark's Grebes along with thorough discussion of hybrids. Not sure if this link will work, but try this:https://cobirds.org/Publications/ColoradoBirds/InTheScope/84.pdfAdam VeselyThornton, CO--On Sunday, April 11, 2021 at 11:20:26 AM UTC-6 Mark Minner-lee wrote:If anyone has been out to see the Western and possible Clark's Grebes at Stern's Lake (Boulder County) I'd love some thoughts on how you determined a Clark's ID. Additional commentary also welcome from others who would like to lend their expertise.
The two grebes I saw both fit Western or Intermediate but not Clark's. Flanks on both birds were dark (suggesting Western). Bill color wasn't different. Both birds had eyes clearly with the dark supercillium area, with the suspected Clark's having some white in the lores.
Thoughts?
Regards,
Mark Minner-lee
Erie, CO
Sent from my iPhone
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