Re: [cobirds] Unknown bird in Indian Peaks, Boulder County

Hi again,

I've had many people suggest a Canada Jay or Clark Nutcracker, which are good suggestions based on their size/shape/habitat, but Corvid vocalizing tends to cover the entire spectrum, from low to high, while the call I recorded was a single frequency going from low to high. The most nuanced call I could find in Merlin from either bird was the Canada Jay's "whispering song." Note the tall bands indicating a broad spectrum of sound and compare that to the spectrogram I posted on eBird which is a single line. 

(Hopefully the attachment works this time.) 

Thanks everyone!

Van

Sent from my iPhone

On Aug 29, 2022, at 06:38, J V Rudd <van.rudd@gmail.com> wrote:



Thanks all. I've added "Bird sp." to my ebird checklist and attached the audio there.

https://ebird.org/checklist/S117654347

Again, sorry for the quality. I was dealing with wind and a nearby stream.

Van

On Sun, Aug 28, 2022 at 8:16 PM van....@gmail.com <van.rudd@gmail.com> wrote:

Hi all,

I was birding just outside Indian Peaks Wilderness Area, near Brainard Lake, and had 4 robin-sized birds with grayish breasts fly over and land in a nearby tree. I was able to get an audio of a call that they were making (attached, admittedly poor quality, sorry) and Merlin couldn't figure it out. I checked birds that fit the geography, size, and color, but found none with a call like this. I checked Townsend Solitaire, Pine Grosbeak (although the bills were more thrush than grosbeak), Olive-Sided Flycatcher (not gray, but...), and even Mountain Bluebird (maybe they were all juveniles?), but none of these have a call that is even close.

Any insights from the experts?

Thanks,

Van Rudd

Louisville, CO

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