Top 10 Giant Ant Species in the United States

Carpenter ants, the largest ant species in North America, infest structures and consume proteins and sugar but do not eat wood.

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Carpenter Ant

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up to 1 inch

Texas leafcutter ants cultivate fungus, exhibit worker size variations, and possess a formidable bite for defense in diverse habitats.

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Texas Leafcutter Ant

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up to 0.75 inches

Red harvester ants, the third-largest ant species in the US, thrive in open grasslands, hoard seeds, deliver painful stings, and are popular for ant farms.

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Red Harvester Ant

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up to 0.5 inches

The Allegheny mound ant, the fourth-largest ant species in the US, constructs impressive mounds, feeds on insects and honeydew, and can become pests in certain environments.

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Allegheny Mound Ant

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up to 0.5 inches

Aggressive army ants lack permanent nests, have diverse species with potent stingers and specialized diets, while some sub-species are the largest ants; African Dorylus queens have impressive reproductive potential.

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Army Ant

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up to 0.5 inches

Florida harvester ants, the sixth largest ant species in the US, exhibit polymorphism, nest in sandy areas, consume seeds and pests, and thrive in high temperatures and low humidity.

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Florida Harvester Ant

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up to 0.37 inches

Western thatching ants: 7th largest US ants, build mounds, bicolored, omnivorous diet, vital prey/predator, ecosystem balance.

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Western Thatching Ant

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up to 0.31 inches

Velvety tree ants, 8th largest US ant species, nest in trees/stones, feed on honeydew, exhibit aggressive behavior, painful bites with secretions.

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Velvety Tree Ant

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up to 0.25 inches

Citronella ants, with their lemon odor when crushed, glossy brick-red color, and aggressive behavior, nest in soil, feed on aphid honeydew, and are active during the day.

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Citronella Ant

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 up to 0.25 inches

Red imported fire ants: 0.25 inches, reddish-brown, 2 petiole nodes, diverse habitats, feed on crop buds/fruits, intriguing food burying behavior.

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Red Imported Fire Ant

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 up to 0.25 inches