Black-and-yellow Mud Dauber Wasps built several mud nests in our shed this past summer. I watched this one as its construction progressed.
Here she is putting the finishing touches on her work of art... a wasp nest that looks like a clump of mud.
photos of the mud dauber's nest when she began to build it. The photo below shows a completed mud dauber wasp nest.
Mud Dauber Wasp Nest, Part III.