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Mud wasp nests? - Sceliphron

Mud wasp nests? - Sceliphron
Montgomery, Somerset County, New Jersey, USA
April 20, 2014
Size: Each nest is about 2 cm
These were built under the roof to a porch, so in a sheltered location. I have seen them both vertical and horizontal. they are about 10 x 25 mm long.

Moved from ID Request.

Probably Sceliphron
This seems to be a mud dauber nest similar to this one.

Compare here.

See reference here.

I don't remember seeing a wasp with such a thin waist, but I will look this summer. Are there several eggs in each long mud 'sausage' or just one? Amazing about the spider thing, that they live with spiders. The place where this is has a lot of spiders in the summer.

A picture tells a thousand words
Here is a picture that may answer your question. They don't just live with spiders; they feed their young spiders.

Incredible and amazing
Fascinating co-evolution. Thanks for sharing! /Lena

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