Date: 12/4/25 3:19 pm From: Bill Schmoker <bill.schmoker...> Subject: Re: [cobirds] Bushtit Range Expansion
Hi Virginia- I was already digging around a little in the Boulder CBC
archives in preparation for this year's count and thought I'd look back to
see what our Bushtit situation has been for the last 20 years. I wonder if
a CO-wide CBC picture could also be produced but haven't looked into that.
Anyway, here's what we've had on the count since 2004:
2004: 8 (in 1 territory)
2005: 4 (feeder watcher)
2006: 20 (in 1 territory)
2007: 7 (1)
2008: 19 (4)
2009: 46 (2)
2010: 58 (3)
2011: 67 (2)
2012: 96 (6)
2013: 8 (1)
2014: 86 (7)
2015: 110 (4)
2016: 27 (5)
2017: 163 (9)
2018: 174 (10)
2019: 92 (6)
2020: 135 (8)
2021: 146 (9)
2022: 178 (10)
2023: 142 (11)
2024: 173 (7)
So definitely the expected ups and downs but overall I see a pretty strong
increase both in numbers of birds and in numbers of territories reporting
Bushtits in our last 20 counts. I suspect that our earlier counts would
show even more Bushtit paucity.
-Bill Schmoker, Longmont
On Thu, Dec 4, 2025 at 2:25 PM Virginia Holman <
<virginiaholmanwrites...> wrote:
> Hi,
>
> Are there any studies/reports re: the Bushtit range expansion in Colorado
> in the last 10-15 years?
>
> I'm coming across significant anecdotal information from longtime birders
> in the region, but nothing formal/science-based yet.
>
> Thanks for any guidance.
>
> Virginia Holman
>
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