Tips to help locate carpenter ant nests

Andrew Fisher, BCE, PHE

Neogen

The nests of carpenter ants (Camponotus spp.) are unique compared to other ant species because, rather than nesting in the ground, they prefer to excavate wood to create their nests. This behavior makes locating these nests more difficult, but it is necessary for effective treatment against them.

To locate carpenter ant nests, focus on finding dry wood near a water source. They avoid damp wood, which can be detrimental to larvae survival.

When inspecting, look for frass — wood shavings resembling sawdust — around baseboards, windowsills and door jambs. Frass may also contain dead ants or ant body parts, indicating the presence of a nest. This is because carpenter ants keep their nests clean by disposing of debris outside.

You might also hear rustling noises from inside walls, ceilings and hollow doors. This occurs mainly at night when the ants are most active.

Locating carpenter ants and their nests requires patience, keen observation and an understanding
of available baits. By identifying these key clues, you can pinpoint their presence and effectively address an infestation.

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from Pest Management Professional https://www.mypmp.net/2025/01/20/tips-to-help-locate-carpenter-ant-nests/
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