Ant Control in Austin: A Comprehensive Guide to Identification, Behavior, & Control

1. Carpenter Ants (Camponotus spp.)

Carpenter ants are large, ranging from ¼ to ½ inch in length, and are typically black or reddish-black. Unlike termites, they do not consume wood but excavate it to create nesting galleries, potentially causing structural damage over time.

Carpenter ants are a nuisance by their presence when found in parts of the home such as the kitchen, bathroom, living room and other quarters. When 20 or more large winged and/or wingless ants are found indoors, in the daytime near one location, it is possible that the colony is well established in the home and the nest may have been extended into sound wood, sometimes causing structural damage. They do not eat wood, but often remove quantities of it to expand their nest size. However, if only one to two large wingless ants are erratically crawling, they may simply be foraging for food with the nest located outside. Outdoors, they are frequently seen running over plants and tree trunks or living in moist, partly rotten wood stumps.

For more detailed information about carpenter ants and their behavior/biology, Pest World has some excellent resources.

Identification:

• Large size with a smooth, rounded thorax.
• Presence of winged reproductive individuals during mating season.

Behavior:

• Prefer moist, decaying wood but can also infest sound wood.
• Often found in kitchens, bathrooms, and around windows.

Control:

• Locate and eliminate the nest, which may require professional assistance.
• Reduce moisture by repairing leaks and improving ventilation.
• Seal entry points and remove wood-to-ground contact.

2. Rover Ants (Brachymyrmex patagonicus)

Rover Ants are quickly becoming a major pain in Central Texas. While probably not the best description they look like small bits of pepper running around on my kitchen counter. These tiny South American ants are tiny to small, dark brown to pale blond, soft bodied, and can be seen excitedly running up and down vertical object in yards, such as blades of grass, chairs and fence posts. Female winged ants are three times larger than the workers, males are small enough to fit through mosquito screening. They feed on the honeydew produced by sap sucking insects on the roots of plants. The rover ant has only one queen and can produce many colonies in one area. They are very difficult to control.

Identification:

• Tiny size with a uniform body shape.
• Often mistaken for other small ant species.

Behavior:

• Attracted to sweet substances and moisture.
• Nest in a variety of locations, including wall voids and potted plants.

Control:

• Seal cracks and crevices to prevent entry.
• Maintain cleanliness by promptly cleaning up spills and crumbs.
• Use bait stations to target the colony.

3. Acrobat Ants (Crematogaster spp.)

Acrobat ants are native to the United States and are identified by the workers holding their tail up above their thorax, like acrobats. The workers range in size from 1/10″ to 1/8″ within different species and vary in color from light brown to dark brownish black. They have a distinct heart-shaped abdomen when viewed from above. The presence of acrobat ant colonies inside homes is normally associated with decayed, moisture-saturated wood from water exposure, leaks or condensation.  They do not colonize sound wood like but prefer water damaged wood or wood already damaged by other insects such as carpenter ants or termites. They are often found foraging in moderately moving tight trails.

Acrobat ants feed on a variety of foods including both sweets and proteins. Workers feed on living and dead insects and on honeydew. Inside structures these ants will feed on household foods, especially sweets. They access structures by trailing along wires, cables, cracks around windows and doors and along the ground.

Identification:

• Heart-shaped abdomen viewed from above.
• Workers emit a foul odor when crushed.

Behavior:

• Nest in decaying wood, insulation, and wall voids.
• Feed on sweets and proteins, including other insects.

Control:

• Remove decaying wood and repair water-damaged areas.
• Use bait stations near activity areas.
• Seal entry points to prevent access.

4. Crazy Ants (Nylanderia fulva)

Crazy ants, also known as tawny or Rasberry crazy ants, are invasive species known for their erratic movements and large colony sizes. They originated from the tropics and are common in Puerto Rico, Florida and other Gulf coast states.  Workers from the colonies are reddish dark brown to black and are all about 1/8″ in length. Their legs are noticeably longer as are their antennae than other ants their size. They generally have loose, unorganized trails and when disturbed run erratically with no apparent direction.

Colonies of crazy ants are relatively small with multiple queens and a few thousand workers. Nests ca be found in both wet and dry soil or under objects on the ground such as potted plants, landscaping timbers, firewood, and next to foundations in mulch and thick vegetation. They also nest above ground in such areas as clogged gutters and under roofs. Nests may exist in wall voids, under carpeting and even under and between undisturbed items stored on floors.

While winged ants are produced in colonies it’s not clear if new colonies are formed from mating flights or by budding, where queens and workers leave a parent nest to begin a new one. They feed on natural food including living and dead insects, honeydew and household food sources that are either greasy and/or sweet.

Identification:

• Long legs and antennae.
• Erratic, rapid movement patterns.

Behavior:

• Nest in various environments, including under rocks, in soil, and inside structures.
• Attracted to electrical equipment, potentially causing damage.

Control:

• Use non-repellent insecticides and baits.
• Eliminate nesting sites by reducing clutter and moisture.
• Professional pest control is often necessary due to their resilience.

5. Leafcutter Ants (Atta texana)

Leafcutter ants are large ants known for cutting and transporting leaves to cultivate fungus, which serves as their primary food source. They can cause significant damage to vegetation.

Identification:

• Workers vary in size, with large mandibles for cutting leaves.
• Distinctive foraging trails leading to nests.

Behavior:

• Defoliate trees and plants rapidly.
• Nest in large underground colonies with multiple entrances.

Control:

• Apply appropriate insecticides to foraging trails and nest entrances.
• Remove vegetation near structures to discourage nesting.
• Professional intervention is often required for effective control.

Q: Are ants dangerous or just annoying?

Most ants are just annoying, but some (like carpenter ants) can damage wood, and crazy ants have been known to short out electronics. Gross and expensive? That’s a hard pass.

Q: What’s the white stuff ants leave behind?

That’s frass—basically ant poop and chewed-up material. If you see it around baseboards or under windows, it’s likely carpenter ants redecorating your house—without permission.

Q: Why do ants keep coming back after I clean?

Ants leave pheromone trails. Even after you clean, the invisible trail can linger unless it’s neutralized with the right cleaners. Also, if the colony is still intact, they’ll keep sending workers.

Q: Do natural remedies like cinnamon or vinegar really work?

They can help repel ants temporarily, but they rarely eliminate a colony. It’s like putting a Band-Aid on a crack in the Hoover Dam.

Q: Is it true that killing a few ants makes things worse?

It can. Squashing a scout ant may trigger the colony to send more. It’s like a red alert. Target the colony, not just the visitors.