Manica bradleyi

Medium-sized red and black ant. Somewhat similar to harvester ants in appearance, but more slender and move more slowly. Colonies tend not to forage on hot days, so in the middle of summer they are most active in the morning and evening. Colonies have small, inconspicuous nest openings. If the colony is not foraging, wind tends to obliterate nest openings, leaving no sign that a nest is there (Nonacs).