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Photo#47378
Blue Mud Dauber Nest - Chalybion californicum

Blue Mud Dauber Nest - Chalybion californicum
Essex, Ontario, Canada
Blue Mud Dauber Nest. Wasps appeared 3rd week in June and stayed until the end of August. A group of them, possibly all males collected under a window sill near the nest and stayed there day and night.

Images of this individual: tag all
Blue Mud Dauber Nest - Chalybion californicum Blue Mud Dauber Congregation - Chalybion californicum - male

blue mud wasp nest?
I was under the assumption that blue mud wasps/blue mud-daubers didn't make their own nests, but used old nests of others. I have a similar-looking structure on my front porch, complete with the darker brown "patches" in the holes.

My question is: Are the darker patches the mud-work of the blue dauber, is it the larvae, or something else altogether?

 
Similiar nest interior in a sandstone outcrop
In Franklin County Washington, I see similar diameter and color of the brown/tan papery interior of the nest but into sandstone cliffs. I dissected the papery stuff but could not decipher if there were larval remains inside. I needed my jewelers loop. Will collect one next time. Love these creatures! Amazing predator.

Very interesting!
Fascinating structure!

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