European Orchard Bee (Mason Bee)
Scientific Name: Osmia cornuta
Order & Family: Hymenoptera: Megachilidae
Size: 11 mm to 15 mm

Natural Habitat
Orchards, gardens, and meadows with nesting sites in hollow reeds or wood
Diet & Feeding
Floral nectar and pollen, primarily from fruit trees and spring flowers
Behavior Patterns
Solitary bee that nests in pre-existing cavities; females are active in early spring and are efficient pollinators
Risks & Benefits
Extremely beneficial as a high-yield pollinator for early crops; very low risk to humans as they are non-aggressive and lack a defensive hive instinct to defend a defendable hive
Identified on: 5/14/2026