description Osmia bucephala Overview
Osmia bucephala is a North American solitary bee in the family Megachilidae, commonly called the large-headed mason bee or bufflehead mason bee. It belongs to Osmia, a genus whose females typically provision nests in pre-existing cavities such as dead wood or hollow plant stems, partitioning cells with plant material or mud. The common name distinguishes this species by its notably broad head, and the species is relevant to studies of native bee diversity and cavity-nesting behavior.
help Osmia bucephala FAQ
What is Osmia bucephala?
Osmia bucephala is a North American solitary bee in the family Megachilidae. It is commonly called the large-headed mason bee or bufflehead mason bee.
Is Osmia bucephala a social bee like a honeybee?
No, it is a solitary bee. Females typically make and provision individual nest cells rather than living in a large cooperative colony with a queen and workers.
Where does Osmia bucephala nest?
Like many Osmia species, it uses pre-existing cavities such as holes in dead wood or hollow plant stems. The female gathers pollen and nectar to provision each brood cell.
What does the name large-headed mason bee refer to?
The common name refers to the species' notably broad head and its membership in the mason-bee group. Mason bees construct partitions and nest chambers with collected mud or similar material.
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