Bee Tunnel Nests: Emergence

On rare occasions I see a small bee or wasp investigating the bamboo tunnel nests at the windows:

Several of the tubes filled & sealed in early June have served their purpose:

Bamboo tubes have a paper-thin liner around the edge, but the mud-sealed tubes have obvious small holes chewed through the end caps:

My assumption that various insects would pick their favorite tube from the assortment seems to be working:

The medium and large tubes haven’t seen much traffic:

We’re glad to help!