Re: [cobirds] Violet-green Swallows & Human Structures

Every year, multiple pairs of Violet-green Swallows nest in buildings on the CU Boulder campus, usually in the space between the red tile roof and the gutter, as far as I've been able to ascertain.

The species also nested in cavities under the eaves of the log cabins of the summer camp where I used to work near Estes Park.

Nathan

On Thu, Apr 28, 2022 at 1:39 PM Charles Hundertmark <chundertmark8@gmail.com> wrote:

I don't recall seeing Violet-green Swallows nesting below the foothills, so nesting at DU might be interesting. However, during the Second Colorado Breeding Bird Atlas field work and before that in New Mexico I have seen these swallows nesting under eaves or in other crevices of rural buildings. The Second Colorado Breeding Bird Atlas species account confirms that this occurs. From the maps in the atlas it also appears that nesting may extend a short distance east from the foothills.

The breeding bird atlas remains an excellent source of information on questions about Colorado breeding birds.

Chuck Hundertmark

Lafayette, CO

On Apr 28, 2022, at 11:59 AM, Jared Del Rosso <jared.delrosso@gmail.com> wrote:

I'm writing to see if birders have observations of Violet-green Swallows nesting in buildings. I've seen them around buildings in the past -- and a few years ago, I watched one fetch bits of landscaping grasses from the tiny greenspace at Streets of Southglenn in Centennial -- but I haven't given much thought to this otherwise. On Tuesday, though, I watched a pair feeding amid Barn Swallows and visiting some small cavities in a stone building on DU's campus (Denver). 

I'm hoping to watch these birds a bit more, but I'm just curious about what others have observed. 

Unlike the building the swallows visited at DU, the buildings at Streets of Southglenn are fairly modern and typical in their design; I suspect at the latter space, they found holes in stucco or facades or small ledges, as opposed to actual cavities in stone.

- Jared

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