Posted: 15/05/2015 at 13:07
It sounds like they are looking at yours now!
Favourite nesting spots for red mason bees are up high in small gaps and holes in bricks and buildings, which is where the 'mason' in their name comes from.
They only live for about 6 weeks. The females spend most of their time making and provisioning the nests.
Once they’ve laid their eggs, the adults die, the larvae hatch, and then in April and May of the following year in the UK, the fully formed adult bee emerges.