Re: [cobirds] Potential CASSIA CROSSBILL in SUMMIT COUNTY

Hi everyone,

By sheer luck and coincidence, I happened to be in almost the same area as Luke and Will but a couple days earlier, on July 17. Specifically I was walking along the Rock Creek trail in the Eaglesnest Wilderness (where the Alfred M Bailey Bird Nesting Area is) when I came across a group of crossbills feeding on some dead but cone-rich lodgepole pines close to the trail. I've been seeking to record crossbills any chance I get, although that is admittedly not an easy task, as they are either often not close, or not cooperative. But this time, they were, at least enough so. As I was recording, Merlin surprisingly boldly flashed "Cassia Crossbill" as their identity after hearing the call notes. I was naturally a bit skeptical, although I was also feverishly wanting Merlin to be right.

After seeing Luke and Will's message this morning (I finally returned from my field season last evening), I was reminded and encouraged to inquire about whether I too had encountered Cassia Crossbills, given that I was as close to their location as I was, in space and time. Around midday today Matthew Young at Cornell confirmed that my recordings were entirely those of Cassia Crossbill.

My recordings can be heard here in the checklist:

https://ebird.org/checklist/S115261178

Eric

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Eric DeFonso
Boulder County, CO

On Tue, Jul 19, 2022 at 8:53 PM William Churchill Anderson <wian6764@colorado.edu> wrote:

Hi all,

This morning, Luke Pheneger recorded what seems to be a group of CASSIA CROSSBILLS in Summit County. Recordings were sent to Matt Young and Tim Spahr, who both came back with the conclusion that they seem to be Cassia. The birds were recorded around here: (39.7184582, -106.1552664). More birders getting more recordings of these birds would be helpful, but it seems that this is the second instance of this species in the state. Good luck to any chasers! 

Good luck,

William Anderson

Boulder 

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