Compact Carpenter Ant

How to identify it

• It's a smaller, more compact relative of the Florida carpenter ants, often living near them.^[1]
• It's day-active, foraging mostly on building exteriors.^[1]

Look-alikes

Where it lives

Exotic to Florida, it's established in Sarasota, Tampa, east Miami and the Florida Keys, and it's widespread in Cuba and from Mexico to Colombia.^[1]

US map: public records from 3 states since 1990 (GBIF). View the map

Biology and life cycle

A single queen usually starts a colony; winged reproductives appear when colonies are two to five years old.^[1]

Damage and signs

• It's rarely seen inside but may enter under doors and through cracks around windows.^[1]

Health risk

It's a nuisance ant; UF/IFAS mentions no health risk to people.^[1]

Control

Keep them out

Caulk exterior openings and add weather stripping.^[1]

Pesticides

Baits along trails help reduce colonies; residual sprays on exteriors and direct nest treatments also work.^[1]

Common questions

What are the small ants marching on my house walls in daylight?

In south Florida, possibly compact carpenter ants, which forage by day.^[1]

Do they come inside?

Rarely, though they may slip under doors and around windows.^[1]

Sources

1. University of Florida IFAS Extension (Featured Creatures), “Compact Carpenter Ant, Camponotus planatus (EENY-189).” edis.ifas.ufl.edu/publication/IN346 (accessed 2026-10-06)
2. iNaturalist, “Camponotus planatus taxon page (order and family).” www.inaturalist.org/taxa/300418 (accessed 2026-10-06)