Date: 10/27/26 11:37 am From: Tom Behnfield <behnfield...> Subject: Re: [cobirds] Marsh Wren vs Western Marsh Wren
Thanks Josh
Tom Behnfield
303-9106858
<behnfield...>
On Tue, Oct 27, 2026 at 12:35 PM Josh Bruening <87211jjb...> wrote:
> Tom,
>
> This should resolve itself unless during certain times of year Marsh Wren
> has traditionally been flagged as rare anyways. The default wren in this
> new split for Colorado will be Western Marsh Wren. The new Western Marsh
> Wren will assume the existing filter limits for each filter region. There
> are no confirmed records of Eastern Marsh Wren in Colorado on eBird and if
> memory serves me correctly, there are no CBRC records either. Maybe @Peter
> Gent <gent...> can confirm this. In some recent communications
> with Andrew Spencer on our Colorado eBird review Slack channel he said:
>
> "Back when I was living in Colorado, I did spend a significant amount of
> effort trying to find an EMWR in the state, inlucing recording birds in the
> eastern tier of counties, especially during migration. While I found a
> couple of birds that visually looked intriguing, every single one I
> recorded proved to be a WMWR. It does seem quite likely that EMWR is a very
> rare migrant on the eastern plains, identifying silent birds is
> complicated. So getting recordings (if possible) of any potential EMWR
> would be vital!" (posting this with Andrew's permission).
>
> Reviewers will be essentially requesting the same level of
> media/recordings for confirmation on eBird that we were looking for with
> the recent Warbling Vireo split. @Nathan Pieplow
> <nathan.pieplow...> -perhaps you could weigh in on your
> experience with these now two separate species? Feel free to keep the
> questions coming!
>
> Bird is the word!
>
> Josh Bruening
> Fort Collins
>
> On Tue, Oct 27, 2026 at 11:09 AM <behn......> <behnfield...>
> wrote:
>
>> Greetings all!
>>
>> This morning I began getting Colorado Needs Alerts for Western Marsh
>> Wren. Will this resolve itself or is there some action I need to take?
>>
>> Good birding!
>>
>> Tom Behnfield
>> Lakewood/Jefferson County
>> <behnfield...>
>>
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