How to Ventilate a Beehive

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What is the ideal mason bee hole size? When we build nests for mason and other solitary bees we are typically catering for a broad range of solitary pollinators.

Mason bees are solitary bees that nest typically in holes and then close the hole up with mud, hence the name ‘mason” or builder. 

1.What Is A Mason Bee Nest?

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The nest I built for her was designed to be attractive to a broad range of solitary pollinator bees such as mason bees, leafcutter bees, and carpenter bees.

2. The Solitary Bee Nesting Site I Built

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Mason Bee Hole Diameter

These insects would normally scout an old rotten branch or similar spot and find borer beetle holes and modify these as their nesting sites.

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My Advice On Your Wild “beehive” Entrance Hole Sizes

First, you will need to find some softwood. Do not make the mistake of confusing softwood (pine, cedar) with wood that is soft.

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ADVICE

Cut sections of this wood that are 7-8″ (20cm) long. I find that the bees seem to prefer if the wood is placed end on – ie if you cut the log such that the cut is across the grain. Then you are looking at the rings in the wood.

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