4 Bugs That Look Like Odorous House Ants

1. Argentine Ant

A small, light-to-dark brown ant that forms huge, cooperating supercolonies. Wide, busy trails often stream into kitchens during hot or rainy weather.

How it differs:

• Color: Odorous House Ants are black and brown; Argentine ants are brown.
• Where found: look for odorous house ants in the kitchen and in the bathroom; Argentine ants turn up in the kitchen and in gardens and on plants.
• Signature feature: Odorous House Ants: small, uniformly dark ant with an uneven thorax. Argentine Ants: uniform light-brown body with one flat node.

2. Little Black Ant

A tiny, jet-black, shiny ant that nests in lawns, under rocks and in wall voids. Workers form narrow trails to sweets, grease and meats.

How it differs:

• Color: Odorous House Ants are black and brown; little black ants are black.
• Where found: look for odorous house ants in the kitchen and in the bathroom; little black ants turn up in the kitchen and in lawns and grass.
• Signature feature: Odorous House Ants: small, uniformly dark ant with an uneven thorax. Little Black Ants: very small, glossy jet-black body.

3. Pavement Ant

A dark brown ant that nests under sidewalks, driveways and slabs, pushing up small piles of sand. Colonies fight noisy battles on pavement in spring.

How it differs:

• Where found: look for odorous house ants in the kitchen and in the bathroom; pavement ants turn up in the kitchen, in basements and garages and in lawns and grass.
• Signature feature: Odorous House Ants: small, uniformly dark ant with an uneven thorax. Pavement Ants: parallel grooves on the head and thorax.

4. Pharaoh Ant

A tiny, pale yellow ant that nests in warm, hidden spots inside walls, cabinets and appliances. Colonies split into new nests when disturbed, which makes them hard to control.

How it differs:

• Color: Odorous House Ants are black and brown; Pharaoh ants are yellow and tan.
• Signature feature: Odorous House Ants: small, uniformly dark ant with an uneven thorax. Pharaoh Ants: very small, light yellow to amber body with a darker abdomen.

Side-by-side comparison

Quick identification checklist

1. Count the legs. Odorous House Ants have 6 legs.
2. Check for wings. Odorous House Ants are usually seen without wings.
3. Measure it. Odorous House Ants are 2–3 mm (up to about 0.12 in).
4. Look for the signature feature: small, uniformly dark ant with an uneven thorax.
5. Note where you found it. Odorous House Ants are usually in the kitchen and in the bathroom.

When you'll see odorous house ants

Odorous House Ants are most active in spring and summer. In spring, overwintering adults become active and many species lay their first eggs. Summer heat speeds up development, so populations can grow quickly.

Typical places to check: kitchen and bathroom.

About ants

The odorous house ant is one of the ants. Ants live in colonies ruled by one or more egg-laying queens. The workers you see are sterile females foraging for the rest of the colony, so killing visible ants rarely solves anything. Winged ants, called swarmers, appear when a mature colony sends out new kings and queens.

Bait works because workers carry it back and share it with the queen and larvae. Repellent sprays can scatter the colony and make the problem harder to fix.

Are odorous house ants or their lookalikes dangerous?

• Odorous House Ant: Odorous house ants are a nuisance only; they rarely bite and don't sting.
• Argentine Ant: Argentine ants don't sting and rarely bite; they protect aphids and scale insects on garden plants.
• Little Black Ant: Little black ants have a sting too weak to feel; they are a nuisance only.
• Pavement Ant: Pavement ants have a weak sting that rarely bothers people; they are mainly a nuisance.
• Pharaoh Ant: They don't bite, but in hospitals and kitchens they can carry bacteria onto clean surfaces.

Frequently asked questions