I present my modular insect hotel.
All hexagons are designed in Fusion 360. I have uploaded stl and fusion360 files of all parts. I would be very happy if you remixed other ideas :)

The outer dimension of the hexagons are 100mm in different depths: 60, 80, 100, 120mm.

The hexagons are easily plugged together with a connector.
There are also many other modules such as a pool for drinking, a hex-Cover to protect the insects for birds, a hotel sign, cute butterfly & bee and much more...

I recommend filling the pool with small stones so that the insects can land safely and drink.

I recommend ASA for outdoor use, but I have only tested it with PLA.
To test the connector use "Hexagon_80_print_test" to save filament.

I hope you like the variety of options!

P.S.: Please always note the highest version. Through many print tests, new versions have repeatedly been created to improve the parts!

If you are interested in what materials you can use to fill the insect hotel, here are the most important informations about what to do and what not to do:

https://www.naturgartenfreude.de/nisthilfen-wildbienen/nisthilfen/baumarktgrauen/