Mini Hearth (Brown 3225) Founding formicaria 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

dual foraging areas OR 4" x 8" nest area (100mm x 200mm)

a darker substrate with some shiny flecks that appear in some types of soil underground

Yellow Side Panel

Light Blue Side Panels

Mini Hearth (Brown 3225) Founding formicaria I would recommend a mediumReady for Immediate Shipping, this Mini Hearth comes as shown in the photo on this page. ***Modular Design (for more information click this (link)*** Nestmates this Mini Hearth comes with a nestmate ($5 value) (See photo). For more information on this feature, watch this video Foraging Area Dcor (as seen in photo) Museum Glass optional ($8) Please watch the following video about how why to operate one of the Mini Hearths most important features, the