🐝 Ants, Bees & Wasps

Blue Mason Bee

Osmia caerulescens

About Blue Mason Bee

A small, metallic blue-black solitary bee that nests in pre-existing cavities in wood and walls. It is common in gardens and readily uses artificial bee hotels.

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Did You Know?

Females seal each egg cell with chewed leaf material mixed with mud.

How to Identify Blue Mason Bee

Blue Mason Bee (Osmia caerulescens) belongs to the order Hymenoptera, family Megachilidae. Adults typically measure 7-10 mm.

Blue Mason Bee Habitat

Blue Mason Bee is found in gardens habitats, particularly across Western Europe, Central Europe, Southern Europe. This species has adapted to thrive in its preferred environment, where it can find suitable food sources and shelter.

Blue Mason Bee Diet and Feeding

Blue Mason Bee feeds primarily on nectar from flowers. In doing so, it acts as an important pollinator, transferring pollen between plants and contributing to plant reproduction and biodiversity.

Where Is Blue Mason Bee Found?

Blue Mason Bee can be found in Western Europe, Central Europe, Southern Europe, where it inhabits gardens environments. Its distribution is influenced by climate, food availability, and habitat suitability.

Distribution Map

Where Blue Mason Bee can be found

Is Blue Mason Bee Dangerous?

Blue Mason Bee belongs to the order Hymenoptera, which includes many stinging insects. While not typically aggressive, it may sting if threatened or handled. Stings can cause pain and swelling, and in rare cases may trigger allergic reactions in sensitive individuals.

Blue Mason Bee Role in Nature

Blue Mason Bee plays an important role as a pollinator. By visiting flowers to feed on nectar or pollen, it transfers pollen between plants, aiding in reproduction and helping to maintain plant diversity. Pollinators are essential for the production of many fruits, vegetables, and wildflowers.

Seasonal Activity

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Peak activity Moderate Low / dormant

Frequently Asked Questions About Blue Mason Bee

What does Blue Mason Bee look like?

The Blue Mason Bee typically measures 7-10 mm.

Where is Blue Mason Bee found?

The Blue Mason Bee is found in Western Europe, Central Europe, Southern Europe and typically inhabits gardens environments.

What does Blue Mason Bee eat?

The Blue Mason Bee feeds primarily on nectar from flowers.

Is Blue Mason Bee dangerous to humans?

The Blue Mason Bee belongs to the order Hymenoptera, which includes stinging insects. While not typically aggressive, it may sting if threatened or handled.

What is an interesting fact about Blue Mason Bee?

Females seal each egg cell with chewed leaf material mixed with mud.

Cite This Page

APA:
InsectDiscover. (2026). Blue Mason Bee (Osmia caerulescens). Retrieved from https://insectdiscover.com/insect/blue-mason-bee

MLA:
"Blue Mason Bee." InsectDiscover, https://insectdiscover.com/insect/blue-mason-bee.