On 20/04/2014 20:20, alan wrote:
My "colony" of solitary mason bees have emerged over the part few weeks.
http://www.admac.myzen.co.uk/bee/
http://www.admac.myzen.co.uk/bee2/

Full instructions please.

They're currently living in holes they've drilled in a disused chimney.
I don't want this to continue - enough holes might matter.

Andy