Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes


Species Chalybion californicum - Blue Mud Wasp

Mud Dauber? - Chalybion californicum Blue mud wasp? - Chalybion californicum  Chalybion californicum - Chalybion californicum Blue Mud Dauber ? - Chalybion californicum Iridescent bluish greenish spider wasp (?) - Chalybion californicum - female Blue Mud Wasp - Chalybion californicum - female Wasp - Chalybion californicum Summer 2015 - Chalybion californicum
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 Chalybion (Blue Mud Wasps)
Species californicum (Blue Mud Wasp)
Other Common Names
Blue Mud-dauber
Synonyms and other taxonomic changes
Chalybion californicum (Saussure)
10-23 mm
A large, active, blue-black wasp with irridescent blue wings. Frequents flowers for nectar and buildings for nest sites. Compare "Steel-Blue Cricket Hunter", (or "Blue Mud Dauber"), Chlorion aerarium, which preys on crickets. This is about the same size as Chalybion, and is said to have a longer pedicel (narrow waist between thorax and abdomen). The body of Chalybion looks much more hairy, and more steely-blue, based on specimen photos.
Widespread in North America
Fields with flowers, near buildings.
April-October in North Carolina
Adults take nectar. Larvae feed on spiders.
Life Cycle
Females construct mud nests in sheltered areas, often under the eaves of buildings, and provision them with spiders. Sometimes refurbishes the nests of other mud-daubers, such as Sceliphron.
Images of males and females here
Print References
Lutz, 1st edition, plate XCII--"C. caeruleum" (1)
Drees, p. 278, fig. 334 (2)
Powell and Hogue, p. 344, fig. 446 (3)
Milne, pp. 842-843 (4)
Swan and Papp, p. 564, fig. 1225 (5)
Arnett, p. 595 (6)
Internet References
Insects of Cedar Creek--photo, Sphecidae page--describes life history briefly.
Univ. of Michigan--species account
Cirrus Digital Imaging--page on mud daubers
Univ. of Tennessee--page on mud daubers
DiscoverLife (photos, description, geographic distribution, natural history)
Works Cited
1.Field Book of Insects of the United States and Canada, Aiming to Answer Common Questions,
Frank Eugene Lutz. 1935. Putnam Pub Group.
2.A Field Guide to Common Texas Insects
Bastiaan M. Drees, John A. Jackman. 1998. Gulf Publishing.
3.California Insects
Jerry A. Powell, Charles L. Hogue. 1989. University of California Press.
4.National Audubon Society Field Guide to Insects and Spiders
Lorus and Margery Milne. 1980. Knopf.
5.The Common Insects of North America
Lester A. Swan, Charles S. Papp. 1972. Harper & Row.
6.American Insects: A Handbook of the Insects of America North of Mexico
Ross H. Arnett. 2000. CRC Press.