9. Leafcutter Ants
1/16 to 1/2 in | Brown | Southern US
Behavior: Harvest fungi. Cut leaves for substrate. Colonies reach tens of millions.
Treatment: Foliar sprays. Leafcutter-specific baits.
10. White Footed Ants
1/8 in | Black with light feet | Southern US to CA
Behavior: Multiple queens, millions of ants. Satellite colonies on neighboring properties.
Treatment: Difficult - do not fall for baits. Use repellents.
11. Thief Ants
1/16 in (tiny) | Yellowish brown | Eastern/Central US
Behavior: Steal larvae from other ant colonies. Access almost anything due to tiny size.
Treatment: Baiting systems and chemical pesticides.
12. Pyramid Ants
1/16 to 1/8 in | Dark body/head | Southern US
Behavior: Nest outside. Single queen, few thousand workers. Feed on fire ants (beneficial).
Treatment: Pesticides, baits, or boiling water on mound.
13. Harvester Ants
1/4 to 1/2 in (large) | Orange to brown | All over US
Behavior: Collect seeds and grains. Live 15-30 years. Defoliate vegetation around mounds.
Treatment: Baits or soil drench to reach queen.
14. Field Ants
1/8 to 1/4 in | Yellow to red/black | All over US, especially South
Behavior: Nest outdoors in parks, lawns, gardens. Feed on honeydew from aphids.
Treatment: Baits or soil drenches.
15. Acrobat Ants
1/8 in | Dark, heart-shaped body | All over US
Behavior: Lift head above body. Recolonize galleries made by other pests.
Treatment: Baiting systems to reach queen.
16. Big Headed Ants
1/8 in | Dark coffee | CA, FL, Eastern states
Behavior: Soldiers have heads twice abdomen size. Create "forager tubes" like termite mud tubes.
Treatment: Baits and perimeter sprays.