Modular wall mountable formicarium for small ants

This is a modular formicarium for small ants (e.g. temnothoxax). It consists of an arena and several different nests. All the pieces can simply be plugged together like plastic bricks children play with.

The nests are either 70x70mm or 70x110mm in size.

There is a wall mount ("Wandhalterung"), which supports the arena, one nest left and right of it, one connection piece ("Verbinder") above it and up to three more nests connected to that.

Also I've put in a piece to close open connectors that still allows air to get into the nests ("Stopfen hohl").

There are covers for the 70x70 nests, so the ants can enjoy their lives in darkness.

Your comments are highly appreciated!