Re: [cobirds] Eared Grebes nesting at Walden & Araphoe NWR

Timing of grebe nesting in North Park is variable depending on conditions at each particular lake. Eared Grebes need shallow water or emergent vegetation to anchor their nests. Smartweed is the most common vegetation used in North Park to anchor nests though they sometimes also nest within cattails stands. Storms are also a factor. When the grebes are nesting in open water, particularly if the nests are not well anchored in vegetation, they can be destroyed by wind and wave action. If nests are destroyed, the grebes will generally attempt to nest again until they are successful or it becomes too late in the season.

I'm not aware of attempts at second nesting once young have fledged, but Birds of the World online might have information on that question.

Chuck Hundertmark

Lafayette

On Aug 1, 2023, at 9:14 AM, Diane Roberts <samatha5760@gmail.com> wrote:

Hello All,

Interesting, I observed EAGR on nests & young on their backs 2 weeks ago.Now they appear to be are all adult. Another lake they are building & on nests. Wondered why such timing contrast. I doubt they are having nests twice. 

Appreciate information!

Diane Roberts

Highlands Ranch, Douglas County

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Diane Roberts

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