Red ants in New Jersey are most noticeable during the warmer months, but “red ant” does not identify a specific species. Carpenter ants and field ants can have reddish coloring, and other common ants may look reddish-brown depending on the species. They should not automatically be mistaken for imported fire ants. For carpenter ants, Rutgers reports activity in the Northeast from about May through October, with the highest activity in July. Size, nesting location, and behavior will tell you more than color alone.

What Are the Red Ants You See in New Jersey?

Several ants can fit a homeowner’s description of a red ant. Identifying the species matters because an outdoor soil nest calls for a different response than ants nesting in damp structural wood.

For New Jersey properties, carpenter ants, field ants, and pavement ants are useful groups to distinguish.

Red Carpenter Ants

Carpenter ants are important to rule out when larger reddish ants repeatedly appear around a building. Rutgers New Jersey Agricultural Experiment Station identifies eight carpenter ant species in the northeastern United States, including Camponotus chromaiodes, commonly called the red carpenter ant.

Carpenter ants do not eat wood. They remove wood to create nesting galleries. Rutgers guidance on carpenter ants notes that queens often establish nests in moist or partially decayed wood and identifies sites such as porch posts, siding, floor joists, doors, window frames, and wood affected by plumbing problems as possible nesting locations.

Where you see the workers is not always where the nest is located. Carpenter ants can forage away from the colony, so ants crossing a deck, foundation, or exterior wall may be coming from another part of the property.

Field Ants

Field ants live mainly outdoors and nest in soil. Depending on the species, their coloring may include black, brown, red, or combinations of those colors. Their nests can produce noticeable mounds in lawns and other open areas.

If reddish ants are concentrated around a soil mound and are not regularly entering the house, field ants are one possible explanation. That is also why a mound in a New Jersey yard should not be identified as a fire ant nest from appearance alone.

A field ant colony in the lawn is different from carpenter ants occupying wood in or around a building. The location of the nest should guide what happens next.

Pavement Ants

Pavement ants are smaller than carpenter ants and are closely associated with hard surfaces. Penn State Extension reports that they commonly nest beneath sidewalks, building slabs, and large rocks. Workers can also enter buildings through cracks in foundation walls and concrete.

Small ants repeatedly following slab joints, foundation edges, or cracks in a patio may fit this pattern. BHB has also documented how pavement ants nest in cracks and beneath buildings, which helps explain why their activity often appears right beside a structure.

For pavement ants, the nesting site is more useful than a slight difference in color. Ants consistently emerging from a crack beside concrete provide a much stronger identification clue.

Are Red Ants in New Jersey Fire Ants?

A reddish ant in New Jersey is not automatically an imported fire ant. Current federal information does not list New Jersey among the states with established imported fire ant infestations.

The U.S. Department of Agriculture’s Animal and Plant Health Inspection Service identifies Solenopsis invicta and Solenopsis richteri as imported fire ants. Current USDA APHIS information on imported fire ants lists infestations in a group of Southern states, California, Virginia, and Puerto Rico. New Jersey is not on that list, and the agency’s New Jersey pest information does not list an imported fire ant quarantine in the state.

Imported fire ants also have characteristics that go beyond color. USDA APHIS describes workers ranging from about 1/8 to 1/4 inch long, with different worker sizes occurring within the same colony. When a mound is disturbed, workers can respond aggressively and sting repeatedly.

If you find unfamiliar reddish ants in a New Jersey yard, identify them by size, nesting site, body characteristics, and behavior instead of assuming a mound or red coloration means fire ants.

When Is Red Ant Season in New Jersey?

There is no single red ant season because “red ant” can describe more than one species. Seasonal patterns depend on the ant and where it is nesting.

Carpenter ants provide the clearest New Jersey-specific benchmark. Rutgers reports that carpenter ants in the Northeast generally become active in May, reach their highest activity in July, and stop seasonal activity around October.

Spring: Carpenter Ant Activity Picks Up

Carpenter ants generally become active in May in the Northeast. As workers begin regular foraging, they may appear on trees, decks, siding, foundations, and other surfaces around a property.

Winged reproductive carpenter ants may also emerge from mature colonies. A winged ant outdoors does not prove that the colony is inside the house. Repeated swarmers emerging from an interior wall, ceiling, window area, or another part of the structure are more significant because their point of emergence may be close to a nest.

Summer: Activity Is Easier to Find

Rutgers identifies July as the peak period for carpenter ant activity in the Northeast. By summer, trails and repeated activity can make nests or entry routes easier to investigate.

Different types of ants may be active on the same property. Pavement ants may be using cracks around concrete while field ants occupy lawn nests and carpenter ants forage around trees or structures.

Look for repeat patterns. Several ants using the same slab crack, foundation opening, damp section of wood, or route to a food source provide more useful information than a single ant crossing a patio.

Late Summer and Fall: Ants Can Remain Active

Carpenter ants can remain active into October in the Northeast. Finding them in late summer or early fall does not necessarily mean a colony has just appeared.

Later in the season, a recurring trail may make the source easier to trace. Ants repeatedly returning to the same wall gap, window frame, concrete seam, or damp structural area provide a clearer clue than scattered outdoor sightings.

Why Red Ants Show Up Around the House

Ant colonies can be present nearby before anyone notices them. Workers become more obvious when they establish regular routes to food, moisture, or an accessible part of the building.

Food and Water Support Indoor Foraging

Crumbs, grease, sugary residue, pet food, and accessible water can keep foraging ants returning to the same indoor area. Kitchens and other places where food and moisture overlap are common places to see trails.

An indoor trail does not prove that the nest is inside. Workers may be coming from outdoors through a crack or gap and traveling back to a colony elsewhere.

Small Openings Give Ants a Route Inside

Foundation cracks, gaps around utilities, openings beneath doors, and spaces around slabs can provide access to the building.

The location of the activity helps narrow the possibilities. Small ants emerging from a concrete or floor crack fit a different pattern from large carpenter ants appearing around damp trim, framing, or a window.

Damp Wood Can Support Carpenter Ant Nests

Repeated carpenter ant activity near damp or deteriorated wood deserves attention. Rutgers associates carpenter ant nest establishment with moist or partially decayed wood.

The ants may not be the only issue. A plumbing leak, roof leak, deteriorated trim, or another source of persistent moisture can make wood more suitable for nesting and may require repair on its own.

What Ant Activity Around Your Property Can Tell You

Before treating visible ants, look at where they are traveling and what surrounds the activity. Location often provides more useful information than color.

Indoor Trails

A consistent trail means workers have found a resource they are returning to. Food and moisture are common reasons ants repeatedly use the same route.

Remove the food or water source where possible, then watch where the ants travel. Their route may lead toward a window, wall opening, door, foundation crack, or another entry point.

Soil Around Concrete Cracks

Piles of excavated soil or repeated ant traffic around sidewalk and slab cracks can be consistent with pavement ants. Penn State notes that pavement ants may bring soil and debris from the nest up through cracks.

Much of the colony can remain hidden beneath concrete. The workers visible above ground may only be the foraging portion of a larger nest.

Large Ants Near Damp Wood

Large carpenter ants near moisture-damaged wood warrant a closer look, especially when activity keeps returning to the same place.

Check both the insects and the condition around them. Leaking plumbing, water intrusion, damaged trim, or consistently damp wood may need to be addressed even if the exact nest has not yet been located.

Mounds in the Lawn

A visible lawn mound does not confirm imported fire ants. Field ants and other soil-nesting species can also create conspicuous nests.

Whether the colony needs attention depends on what species is present and where the nest sits. A colony well away from the house presents a different situation from ants nesting beside a patio, foundation, walkway, or another frequently used area.

Do Red Ants Damage Lawns or Homes?

The answer depends on the species. Ants that look similar can have very different effects on a property.

Field ants generally nest outdoors. Their excavation can produce visible mounds, but finding a colony in the lawn does not automatically mean the turf is being seriously damaged.

Pavement ants are primarily a nuisance around structures. Colonies can remain beneath concrete while workers enter kitchens or other indoor spaces through small cracks.

Carpenter ants require more attention when they are associated with a building because they excavate wood to make nesting galleries. Rutgers notes that carpenter ant damage seldom compromises a building’s structural integrity, but a colony can still damage the wood it occupies. Their presence may also point to moisture that should be corrected.

How to Reduce Ant Activity Around the Property

The most useful prevention steps remove the food, water, access, and nesting conditions ants are using. Killing a few visible workers does not necessarily reach the colony.

Reduce Food, Water, and Access Indoors

Focus on conditions that repeatedly draw ants inside:

• Clean crumbs, grease, spills, and sugary residue promptly.
• Keep food securely stored where practical.
• Avoid leaving pet food accessible longer than necessary.
• Repair plumbing leaks and other recurring moisture sources.
• Seal accessible cracks and gaps that ants repeatedly use.

These measures may not eliminate an established colony, but they can reduce indoor foraging and help make entry routes easier to identify.

Correct Favorable Conditions Outside

Pay attention to concrete cracks, utility penetrations, damp wood, vegetation touching the building, and stored materials close to exterior walls. These areas can provide either nesting conditions or convenient access.

For carpenter ants, Rutgers recommends correcting leaks and moisture problems, keeping firewood off the ground and away from the house, and cutting back vegetation that can provide access to the structure.

Do not use a temporary drop in visible activity as proof that the nest is gone. The colony may remain under soil or concrete, inside wood, or elsewhere nearby even when fewer workers are visible.

When Professional Ant Control Makes Sense

Professional identification is useful when ants keep returning to the same area, large ants are associated with damp wood, workers appear to be coming from walls or structural gaps, or winged ants repeatedly emerge indoors. It also makes sense when an outdoor mound or reddish ant cannot be identified with confidence.

The treatment approach depends on the species and where the colony is located. If recurring ants are difficult to trace or keep returning after basic prevention steps, BHB’s ant control services can address the activity based on the species, nest location, and conditions found at the property.

For homeowners and property managers in Northern New Jersey, visit BHB Pest Elimination to review available pest control services. If ants are repeatedly entering the building, appearing around damp wood, or nesting where the source is difficult to locate, contact BHB Pest Elimination to request an inspection and discuss the next step.