Setting out new nests next to the old ones?

A question from Michael in Oregon.
Hi Margriet,
If I need to set out more nesting sites for the Mason bees should I put them next to existing sites, or, put them a bit away from the one’s I originally set out?
The reason I ask is that I am get many more bees to nest so far this spring compared to last year but I do not want to mess up the bees visual cues to the old sites.  I also know they like to be near each other.  Your thoughts?

I don’t have the exact answer, but I think you are on the right track.  Perhaps in visual range and clustered nearby would be a good solution. -Margriet

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