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Insect nest structures #745296

Asked April 20, 2021, 11:52 AM EDT

Found this cemented structure in my back yard composed of small pieces of stone. Size is 3cm x 4cm and 1.5 cm high. What kind of insect does this?

Josephine County Oregon

Expert Response

I am not entirely sure. The only way to know is to enclose the nest with an insect-proof mesh and see what comes out. I am a bee expert, which affects my answer, but it could be the nest of one of our resin bees in the genus Dianthidium:

https://www.honeybeesuite.com/dianthidium-bees-not-amateurs/

Andony Melathopoulos, Assistant Professor Pollinator Health Extension Department of Horticulture | Oregon State University 4017 Agricultural and Life Science Building | Corvallis, OR 97331-7304 cell: (541) 452-3038 Andony.Melathopoulos@oregonstate.edu oregon bee atlas | oregon bee project | twitter | facebook | instagram | podcast Replied April 20, 2021, 4:05 PM EDT
Thanks for the information.  The nest is empty unfortunately, but the website you provided had one picture that at least looks similar.

On Tuesday, April 20, 2021, 1:05:27 PM PDT, Ask Extension <<personal data hidden>> wrote:


The Question Asker Replied April 20, 2021, 4:34 PM EDT

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