Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Species Chalybion californicum - Common Blue Mud-dauber Wasp

Chalybion californicum - male Iridescent bluish greenish spider wasp (?) - Chalybion californicum - female Nocturnal aggregation of metallic blue wasps - Chalybion californicum - male Possible Chalybion californicum - Chalybion californicum Possible Chalybion californicum - Chalybion californicum Black wasp sp? - Chalybion californicum Summer 2015 - Chalybion californicum Blue Mud Dauber - 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 (Mud-dauber Wasps)
Genus Chalybion (Blue Mud-dauber Wasps)
Species californicum (Common Blue Mud-dauber Wasp)
Other Common Names
Common Blue Mud Wasp
Common Blue Dirt-dauber Wasp
Blue Mud-dauber (applies to other members of the genus)
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(1)
Fields with flowers; residential areas
Apr-Oct in NC
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.
Print References
Internet References