Pogonomyrmex rugosus (Rough Harvester Ant)

The seed coats of fillaree have corkscrew shape. When humidity changes, the tightness of the corkscrew also changes, helping to screw the seeds into the soil. At certain times of year it is common to find Harvester Ants that have been trapped in the coils of the fillaree seeds, as in this photo.
The seed coats of fillaree have corkscrew shape. When humidity changes, the tightness of the corkscrew also changes, helping to screw the seeds into the soil. At certain times of year it is common to find Harvester Ants that have been trapped in the coils of the fillaree seeds, as in this photo.