Fallen Fortress(Brown 9123)(Canyon)(MQ BOX) Immediate Shipping 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

Small/Medium Species Chambers

Your purchasing the product depicted in the photos accompanying this product page

What comes with the purchase of a Mrymecocystus navajo Queen and Colony Mini Hearth Bundle Package

1 nestmate (XL version - 2 nestmates) for drinking water or ventilation

Fallen Fortress(Brown 9123)(Canyon)(MQ BOX) Immediate Shipping Formicaria I would recommend a medium***Ordering the product on this page? You will receive the exact formicarium in the photos accompanying this product page. This formicarium has already been made and can be modified only with the options for glass type and removable vent lid.*** ***Canyon Foraging Area***(+$15) ***MQ BOX This Box is made of a special acrylic, thicker than our standard acrylic boxes and scratch resistant. Also, the lid is held on by strong magnets and easier to remove