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Species Sceliphron caementarium - Black and Yellow Mud Dauber

Colorful wasp - Sceliphron caementarium Wasp - Sceliphron caementarium Which big wasp, please? - Sceliphron caementarium Yellow & Black Mud Dauber Wasp - Sceliphron caementarium Wasp - Sceliphron caementarium Black-and-Yellow Mud Dauber and ? - Sceliphron caementarium Yellow and black mud daber - Sceliphron caementarium - female Black and Yellow Mud Dauber - Sceliphron caementarium
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon (Aculeata - Ants, Bees and Stinging Wasps)
No Taxon (Apoid Wasps (Apoidea)- traditional Sphecidae)
Family Sphecidae (Thread-waisted Wasps)
Subfamily Sceliphrinae
Tribe Sceliphrini
Genus Sceliphron
Species caementarium (Black and Yellow Mud Dauber)
Explanation of Names
Sceliphron caementarium (Drury 1773)
caementarium = 'mason, builder of walls'
24-28 mm
Black body with variable amount of yellow markings. Pedicel (waist) about twice as long as the rest of the abdomen.
Tips on how to determine sex:
Throughout NA (s. Can. to C. Amer. and W. Indies) - Map (1)(2); accidentally introduced into Europe several times, well established in several countries since the 1970s(3)
Adults nectar at flowers; mud nests are built in all kinds of sheltered locations, incl. man-made structures, rock ledges, etc. Adults collect mud for nests at puddle/pool edges.(4)(5)
mostly: Apr-Oct (2)
Nests are provisioned with spiders; adults common at flowers(4), especially parsnip and water parsnip, and visit hummingbird feeders.(5)
Life Cycle
common where water splashes on bare soil (MAQ, pers. obs., 2019)
Nests may comprise up to 25 cylindrical cells, with typically 6-15 (up to 40) prey spiders per cell. The female may provide the cells with a temporary closure (a thin mud curtain) to keep out parasites while she is collecting prey. Once the cell is stocked, she lays an egg on one of the last prey and seals the cell with a thick mud plug. She may then add more mud to cover the entire cluster of cells.(5)