A nest of Pogonomyrmex badius, the Florida harvester ant. Nests of this species are characteristically ringed with debris and small pieces of charcoal, which are thought to serve as a boundary to keep other ants away from the nest entrance. Archbold Biological Station, Florida, USA

Pogonomyrmex badiusPogonomyrmexflorida harvester antharvester antsformicidaemyrmicinaehymenopteraaculeataapocritavespoideaecologygranivoryseed dispersalsand scrubinsectsbiologysciencenestnest discant moundant nest