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Unlike honey bees or bumblebees (Bombus), Osmia species are solitary; every female is fertile and makes her own nest, and no worker bees for these species exist. [1] Eastern snail shell mason bee (Osmia conjuncta) Hornfaced bee (Osmia cornifrons) When the bees emerge from their cocoons, the males exit first. The males typically remain near the ...
Since the nest entrances of O. bicornis are not sealed, the contents of the nests (such as larvae, pollen, or nectar) are targeted by parasites while the female is out on a provisioning trip. The risk of being parasitized is related to the time the cell is left unguarded by the bee.
“Mason bees build their nests in pre-existing cavities, such as holes in wood, hollow stems, ... After mating, the female mason bee provisions each cell, holding 4 to 10 eggs, with pollen and ...
In August 2019 a Mason Bee nest made from Hydrangea petals was discovered in a conservatory in Bristol, England. The bee is thought to have arrived in the UK in holiday luggage from Dalaman, Turkey. Once notified, the British Beekeepers Association said the bee had the potential to harm native species.
The female will also deposit sand, gravel and soil between the last cell and the plug as an anti-predator barrier. The shell is then manipulated by the female so that the entrance is facing towards the ground. [5] Once the nest is complete the female covers the shell in a canopy of grass stems, small twigs or leaves to camouflage it. [1]
The first thing the females do is mate. A female typically mates once, or maybe twice. She is absent from the nesting site for several days while she feeds and waits for her ovaries to fully mature. "Bee house" used for O. lignaria Orchard mason bee on an apple bloom Example of nesting-site variations