Some arbiter of fashion and style must have seen a wasp like this when he/she coined the wasp-waisted term. That is one threadlike abdomen, so small one wonders how this animal even functions. Sure creates a neat look, though.
Yellow-and-black Mud Daubers have an apropos scientific name: Sceliphron caementarium. You've probably seen their nests. Little bungalows of plastered mud tucked under bridges or building eaves, they are engineering marvels. It takes a lot of work and a lot of time to make one of these adobes of death. The wasp makes repeated trips with tiny glomerules of sticky mud, cementing each perfectly into place.
And death adobes they are. The above shot shows the inner chambers; final resting places for unfortunate spiders. The adult mud dauber captures and paralyzes its archnid prey, and somehow lugs it up to the nest. The victim is then sealed into the chamber along with a wasp egg. Upon hatching, the wasp larva has a fresh meal.
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