Hearth (Grey 1-Dual-Sided) ready to ship formicarium I would recommend a medium

I would recommend a medium sized nest for them because the chambers and tunnels for the Pioneer are larger on average than  some of our other nests

This side also comes with magnets and glass attached

a 4" x 8" nest area (100mm x 200mm)

Green Exterior/Sand Interior Color

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Hearth (Grey 1-Dual-Sided) ready to ship formicarium I would recommend a mediumThis product is available for immediate shipping and is shown in the accompanying product photos. Click on this link to see more about this product. Features: nest is 3" x 8" (75mm x 200mm) 2 Sided (+20) Grassland Decor 2 large water towers Stalactite decor on interior Type III material Museum Glass Optional