🐜 Ants

Acrobat ant

Crematogaster species

Heart-shaped abdomen, held up over its back when you disturb it.

Size
An eighth to a sixth of an inch
Colour
Light brown to black, often two-toned
Risk
Moderate
When
Spring through autumn, moving indoors in heat and after rain
An acrobat ant in profile: a small reddish ant with a distinctly heart-shaped dark abdomen raised above its thorax.
The heart-shaped abdomen, held up over the back. That posture is what the name refers to. AI-generated illustration · FreePestControlInspection.com

How to identify it

Work down these in order — the first one is usually enough on its own.

  • The abdomen is distinctly heart-shaped seen from above
  • Raises that abdomen over its thorax when alarmed — the behaviour it is named for
  • Two nodes in the waist
  • Trails along wires, pipes and tree limbs rather than across the ground

What it gets mistaken for

Most people arrive at a pest name by ruling things out. These are the ones that genuinely look similar, and the detail that separates them.

Where you will find it

  • Water-damaged wood, wall voids and foam insulation
  • Behind exterior cladding and under roof flashing
  • Along utility lines and tree limbs touching the building
  • Under stones, in logs and tree cavities outdoors

Signs it is already there

You will nearly always see the evidence before you see the pest itself.

  • Ants trailing along a wire, pipe or limb into the structure
  • Small piles of debris pushed out of a void — insulation fragments, wood bits, dead ants
  • Ants lifting their abdomens when you disturb the trail

Moderate. Worth dealing with, but not an emergency.

Why it is harder to deal with than it looks

They nest in voids and damaged wood rather than soil, and they travel aerial routes — wires, pipes, branches — so a ground-level perimeter spray misses both the nest and the road to it.

What actually works

Follow the trail back to where it enters and cut the aerial route: trim limbs clear of the roof, check where wires and pipes penetrate. Find and fix the moisture that softened the wood, and replace what is damaged. Bait rather than spray the trail.

Common questions

How do I tell a acrobat ant from a odorous house ant?

Odorous house ants have a rounded abdomen they never raise, and smell musty when crushed.

How do I tell a acrobat ant from a carpenter ant?

Carpenter ants are much larger, with a single waist node and an evenly rounded thorax.

Where are acrobat ant usually found in a home?s

Water-damaged wood, wall voids and foam insulation Behind exterior cladding and under roof flashing Along utility lines and tree limbs touching the building.

Is a acrobat ant dangerous?

They do not hollow sound timber the way carpenter ants do, but they nest in wood already softened by moisture and in foam insulation — so finding them usually points at a leak worth tracing.

Identification guidance only. Under Texas law, applying pest control treatments for hire requires a licence from the Texas Department of Agriculture. This page describes what a pest looks like — it is not a diagnosis of your property or a treatment recommendation for it.