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Actually, in case of the solitary bees it is a "hive" for their eggs only (as described in the article) ... the bees themselves aren't living in the bamboo tubes (just sometimes they may temporarily hide there, if they get caught by bad weather).
These types of bees also don't produce honey, but they are very important for the pollination of flowers.

I know there is a lot of concern about the survival of the bees. A world without bees is practically dead ... Every way to help them is therefore important!