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Size: 1/4—3/8 in. (Among the Largest Ant)

Color: Often black, but may have reddish or yellow color

Habits: Nest in dead wood—trees, landscape timbers, stumps, logs etc.. Parent colonies may include satellite colonies that invade homes in search of food. Will nest in any suitable void. Nests in homes can often do great damage. They do not eat wood but will hollow out “galleries” in the wood. Often signs will include piles of wood shavings.


Size: 1/10 in.

Color: Brown

Habits: Invade homes in search of food. Will nest outdoors under stones, along curbs, beneath slabs, sidewalks, patios, and driveways. Inside under floors and walls. Often found in slab construction homes. Indication may be piles of displaced soil next to pavement.


Size: 1/16 in.

Color: Light Yellow

Habits: Often in food service areas. Will nest in any well protected area throughout a structure. Travel along electrical wires or plumbing pipes. Very large colonies. Will split up and disperse to different areas of home when disturbed or sprayed. Specific baits and targeting needed.


Size: 1/8 in.

Color: Jet Black

Habits: Nest in any suitable, moist place, under rotting wood, brick or rock. May establish colony inside a wall or under carpet near a doorway. Partial to sweet honey scented fruit trees, roses and shrubs.


There are many species of house-infesting ants, the ones listed above are common to the Midwest. A professional can identify the ant and provide the best means of elimination and control. Many ant problems can be controlled through the use of baits or sprays. Baits are carried back to a nest and fed to the other ants in the colony, resulting in elimination. Winged ants are best controlled with liquid and or dusts.

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