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Red Mason Bee

(Osmia bicornis)

The Red Mason Bee is a common, gingery bee that can be spotted nesting in the crumbling mortar of old walls. Encourage bees to nest in your garden by putting out a tin can full of short, hollow canes.

Red Mason Bee © Penny Frith
Red Mason Bee © Penny Frith
Red Mason Bee male © Leanne Manchester
Red Mason Bee male © Leanne Manchester

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Overview

The Red Mason Bee is a solitary bee so, after mating, each female builds her own nest; she lines each ‘cell’ with mud and pollen and lays a single egg in each until the cavity is full. The larvae hatch and develop, pupating in autumn and hibernating over winter.

The Red Mason Bee is on the wing from late March, and feeds solely on pollen and nectar. They can be found nesting in hollow plant stems, in holes in cliffs, and in the crumbling mortar of old buildings.

Key Facts

  • The Red Mason Bee is covered in dense gingery hair; the males are smaller than the females and sport a white tuft of hair on the face. There are many similar species of masonry bee that can be difficult to identify.
  • You can provide a home in your garden for solitary bees by putting some dry grass in an upturned flowerpot and partly burying it. Alternatively, you can make an insect home by filling an old tin can with short lengths of cane, placing them vertically inside the can so that their hollow insides are visible.
  • Length: 0.6-1.1cm

Status

Common.

Seasonality

March to June

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