Date: 9/12/26 1:32 pm From: Jared Del Rosso <jared.delrosso...> Subject: Re: [cobirds] Re: Late nesting barn swallows
Inspired by Nathan's post and wondering whether the young Barn Swallows
were still in the nest, I took a short walk at the same shopping center in
Arapahoe County around 2:10 PM this afternoon. The two Barn Swallows were
still in the nest, looking chubby and very soon able to leave the nest. In
the very short time I visited them (approx. 5 seconds), an adult came in
and fed them at the nest. On my walk *to* the nest, it looked like other
feeding flights were made into the nest area.
[image: PXL_20260912_200624403 (1).jpg]
- Jared Del Rosso
Centennial, CO
On Saturday, September 12, 2026 at 11:38:26 AM UTC-6 Nathan Pieplow wrote:
> Scott, Jared, et al.:
>
> I have a Barn Swallow nest right outside my front door, and in most years
> it fledges two broods. As of last night, the three juveniles from the
> second brood were still returning to the nest regularly during the day and
> roosting in it every night, even though their first flights took place
> probably ten days ago. The nest is frequently empty when I leave for work
> in the morning, and I often come home from work in the afternoon to find
> all three juveniles huddled inside it.
>
> This raises a question of what counts as "fledging" in this species, and
> how one can tell. The nest that Scott observed was definitely on a later
> schedule than the one at my house, since the parents haven't been regularly
> feeding at my house for over a week, but as late as yesterday the nest
> would probably have earned a legitimate "NY" breeding code if someone
> happened upon it at the right time of day.
>
> Nathan Pieplow
> Boulder
>
> On Sat, Sep 12, 2026 at 10:00 AM Jared Del Rosso <jared.d......>
> wrote:
>
>> Inspired by Scott's posts about these swallows, I went for a short "walk"
>> at a local shopping center in Greenwood Village-ish (closer to Littleton &
>> west Centennial than DTC) in Arapahoe County where Barn Swallows typically
>> nest. The first three or so nests were empty, but the fourth had young in
>> it. Two, I think?
>>
>> [image: PXL_20260912_154455118.jpg]
>>
>> - Jared Del Rosso
>> Centennial, CO
>>
>> On Friday, September 11, 2026 at 8:50:24 AM UTC-6 Scott Somershoe wrote:
>>
>>> I’ve been checking a Barn Swallow nest near my house in Littleton for
>>> the last week. I was sure they would have fledged by today, but there are
>>> still four young being fed by parents about every 30 seconds! Yes, today,
>>> Sept 11.
>>>
>>> The latest nest with young in the 2nd Colorado Breeding Bird Atlas was 9
>>> Sept. This nesting attempt is definitely at the very tail end of nesting
>>> and maybe the latest recorded nest with young in the state. Either way,
>>> these youngins need to get a move on!
>>>
>>> Cheers,
>>> Scott Somershoe
>>> Littleton, JeffCo.
>>>
>>> [image: 1200.png]
>>>
>>> eBird Checklist - 11 Sep 2026 - Lilly Gulch Regional Trail--S Kipling
>>> Pkwy to S Pierce St. - 20 species
>>> <https://ebird.org/checklist/S391812245> >>> ebird.org <https://ebird.org/checklist/S391812245> >>> <https://ebird.org/checklist/S391812245> >>>
>>>
>>>
>>> Sent from my iPhone
>>>
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