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These are beautiful, excavation and casting of an ant’s nest –

A plaster cast of a large Pogonomyrmex badius nest. This nest consisted of 135 chambers and 12 meters of vertical shafts. The top-heavy distribution of chamber area and spacing is typical for the species, as are the helical shafts and the decrease of chamber size with depth (photo by Charles Badland).

BIOONE Online Journals – The nest architecture of the Florida harvester ant, Pogonomyrmex badius – [via] Link.