Contact your local county Extension office through our County Office List.

Colorado School IPM
Sixteen school districts, serving 58% of the students in Colorado public schools, participate in IPM.

Field Ant   arrow

Field AntFormica sp.


  • black or reddish brown and black
  • 1/8 inch in size
  • most common ants found in yards and gardens
  • often mistaken for carpenter ants, but not as likely to forage indoors (observed indoors most commonly in spring)

Nesting Habits

  • nest outdoors in loose soil
  • produce mounds (sometimes incorporating twigs, dried leaves and other plant materials) in exposed areas


  • a variety of foods
  • prefer sweet materials such as honeydew excreted by aphids and other insects


  • become a nuisance during swarming flights

IPM Recommendations:

  • Seal potential ant entryways.
  • Store food in airtight containers, and dispose of trash regularly.
  • Locate and destroy nests in lawn and adjacent areas.