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Species Anthidium manicatum - European Wool-carder Bee

Anthidium manicatum or maculifrons - Anthidium manicatum - male Small, bright yellow bee, Bay Area, CA - Anthidium manicatum Bee - Anthidium manicatum Megachilid - Anthidium manicatum - male European Wool Carder Bee? - Anthidium manicatum Carder Bee? - Anthidium manicatum Unknown Hymenoptera - Anthidium manicatum Anthidium? - Anthidium manicatum - female
Classification
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 (Anthophila (Apoidea) - Bees)
Family Megachilidae (Leaf-cutter Bees, Mason Bees, and allies)
Subfamily Megachilinae
Tribe Anthidiini
Genus Anthidium
No Taxon (Subgenus Anthidium)
Species manicatum (European Wool-carder Bee)
Synonyms and other taxonomic changes
=marginatum, obtusatum
Explanation of Names
Females collect "wool" from downy plants such as Lamb's Ears to line their nest cavities
Size
Female: 11–13 mm. Male: 14–17 mm
Identification
Robust, black and yellow. Males significantly larger than females.
Range
Introduced from Europe before 1963; spreading throughout NE. & W. NA
Habitat
disturbed habitats; visits garden flowers and weeds of Old World origin; nests in cavities:

1 Wool gathering     2 Nest building      3Nest
Food
It is a generalist (polylectic: uses pollen from flowers of different families) visiting preferably blue flowers with a relatively long throat (Eickwort 1980). The Hosts section on its Discover Life species page lists known associations based on specimen records and images.
Remarks
Males defend their territory very aggressively not only against other males but also against other flower visitors.
Print References
O'Toole, C. and Raw, A. (1991) Bees of the World.