An ant that gathers and stores seeds and grain as a communal food source for the colony.
- Messor and other genera, family Formicidae
- Grassland harvester ants harvest very few seeds of the most abundant species at the beginning of a season, but switch during the season possibly due to increasing rarity of the preferred species.
- Some ants, known collectively as harvester ants, do consume seeds, but the seeds they eat are typically those of grasses or other plants that lack elaiosomes.
- The shuttle carried 15 large harvester ants found normally in the western United States so that the students could learn how space's extremely low gravity affects their tunneling behavior.
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