Mortar Bee

Mortar Bee

Mortar bees, also known as mason bees, are a type of solitary bee that is found in many parts of the world. They are so-called because they construct their nests out of mud or other materials, which they “cement” together to create sturdy walls. Mortar bees are important pollinators of many different types of plants and crops, and their habit of using pre-existing holes and crevices to build their nests means that they are easy to attract to backyard gardens and other urban environments. They are generally non-aggressive and do not pose a significant threat to humans, although they can sting in self-defence if provoked. Mortar bees are a fascinating and important part of many ecosystems, and are studied and appreciated by entomologists and other scientists.

Mortar Bee


  • Mortar bees are small and typically measure around 6-12 mm in length.
  • They have a stout, compact body shape and short antennae.
  • Mortar bees are typically black or dark in colour, although some species have metallic or brightly coloured markings.
  • They have strong mandibles that they use to collect and manipulate mud or other materials for nest-building.
  • Male and female mortar bees can be distinguished by differences in their antennae and genitalia.


  • Mortar bees have a life cycle that consists of four stages: egg, larva, pupa, and adult.
  • Female bees construct individual nests out of mud or other materials, laying eggs in each cell and provisioning them with pollen and nectar.
  • The larvae hatch from the eggs and consume the stored food, growing rapidly and molting several times.
  • After several weeks, the larvae spin cocoons and enter the pupal stage, undergoing metamorphosis and developing into adult bees.
  • The adults emerge from the cocoons and mate, with males typically dying soon after and females continuing to forage and build nests.


  • Mortar bees are solitary insects that do not live in colonies or hives.
  • They are important pollinators of many different types of plants and crops and are often used in commercial pollination operations.
  • Mortar bees are non-aggressive and generally do not pose a threat to humans, although they can sting in self-defence if provoked.
  • They are attracted to pre-existing holes and crevices in wood, masonry, or other materials, which they use to construct their nests.
  • Mortar bees are active during the spring and summer months and may overwinter as larvae or pupae.

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