While most ant bites are more of an annoyance than anything, there have been cases where an allergic reaction to an ant bite can be serious, even causing death. Whether you want to just enjoy your yard and home free of ants or are looking to identify the type of ants biting your ankles and toes, we can help!
Types of Ants in New Jersey
New Jersey is home to a variety of ant species, some of which are harmless, while others can be destructive or even dangerous. Protect your home and your health by understanding the types of ants commonly found in the state, how to keep them away, and how to identify the ant that may have bitten you.
1. Carpenter Ant
- Appearance: Large (¼-¾″), usually black or dark brown
- Behavior: Nest in moist or decaying wood, carving galleries. They don’t eat wood but damage structures by hollowing it out.
- Bite/Sting: Cannot sting, but they can bite and spray irritating formic acid.
Carpenter ants are one of the most prevalent and damaging ants in New Jersey. These ants are large, usually black or dark brown, and nest in moist or decaying wood. While they do not eat wood like termites, they excavate it to create their nests. This can cause significant structural damage over time. Carpenter ants do not sting, but they can bite. They often spray formic acid into the wound, causing additional irritation.
2. Pavement Ant
- Appearance: Small (1/16-1/8″), dark brown to black with pale legs.
- Behavior: Nest under sidewalks and driveways. They form large colonies.
- Bite/Sting: Mild bite and acidic sting causing minor irritation.
Pavement ants are another common species. They are small, dark brown to black ants that typically nest under sidewalks, driveways, and foundations. These ants are known to form large colonies and can become a nuisance when they forage indoors for food. Although they can bite and occasionally sting, their bites usually result in only minor discomfort.
3. Acrobat Ant
- Appearance: 1/8–1/4″, yellow-brown to black, abdomen raised in defense.
- Behavior: Nest in damp wood; aggressive and territorial
- Bite/Sting: Quick to bite; has a stinger and emits a foul odor
Acrobat ants are identifiable by their unique habit of raising their heart-shaped abdomens over their heads when threatened. These ants nest in damp wood and are known for their aggressive behavior, especially when their nests are disturbed. They are capable of biting and also emit a foul odor as a defense mechanism.
4. Pharaoh Ant
- Appearance: Tiny (~1/16″), yellow to red‑brown.
- Behavior: Indoor pest with large multi-queen colonies; hard to control via spraying.
- Bite/Sting: Mild and mainly a nuisance.
Pharaoh ants are tiny, yellow to red-brown ants often found indoors. These ants establish large, multi-queen colonies that are difficult to eliminate using conventional sprays. Although their bites are not painful, their presence in kitchens and hospitals can be particularly problematic due to their potential to spread bacteria and disease.
5. Little Black Ant
- Appearance: Tiny (~1/16″), shiny black.
- Behavior: Indoor invaders, nesting in walls and moisture-prone areas.
- Bite/Sting: Mild bite, causes slight itching.
Little black ants are among the smallest ants found in New Jersey. Shiny and black, these ants often invade homes in search of food and moisture. Their bites are mild and usually result in only slight itching or redness.
6. Odorous House Ant
- Appearance: Dark brown, 1/16–1/8″. Emits a rotten coconut odor when crushed.
- Behavior: Forages indoors for sweets and nests in walls and mulch.
- Bite/Sting: Non-aggressive; no bite or sting.
Odorous house ants get their name from the rotten coconut-like smell they emit when crushed. These small, dark brown ants often nest in walls, under floors, and in mulch. While they do not bite or sting, they can be a significant nuisance, especially when foraging for sweet foods indoors.
7. Yellow/Citronella Ant
- Appearance: Yellow to red‑yellow, ~3/8″ .
- Behavior: Nest in soil, feed on aphid honeydew; emit citronella scent when crushed.
- Bite/Sting: Non-aggressive, little to no biting.
Yellow ants, also known as citronella ants, are another soil-nesting species that are more often seen indoors during mating season. These ants emit a citrus-like odor when crushed. They are not aggressive and do not typically bite.
8. Argentine Ant
- Appearance: Small (~1/10″), light to dark brown.
- Behavior: Highly invasive; supercolonies can reach millions.
- Bite/Sting: Minor bite; more of a food contaminant.
Argentine ants are not native to New Jersey, but have been reported in some areas due to their invasive nature. These ants are small, light to dark brown, and form massive supercolonies. While they are not known for painful bites, they can quickly overrun homes and contaminate food sources.
9. Fire Ant
- Appearance: Reddish-brown, ⅛–¼″.
- Behavior: Aggressive, build visible mounds in lawns; sting in swarms.
- Bite/Sting: Painful stings that form pustules and can cause allergic reactions, even anaphylaxis.
Fire ants are more common in southern regions but have occasionally been spotted in New Jersey. These reddish-brown ants are highly aggressive and known for their painful stings. They also inject formic acid into the skin that can result in pustules and, in some cases, allergic reactions.
10. Asian Needle Ant
- Appearance: Small (~1/5″), hard to spot.
- Behavior: Don’t leave pheromone trails, nest in mulch and leaf litter. Newly spread to the Northeast, including New Jersey suburbs.
- Bite/Sting: Needle-like sting, very painful and potentially life-threatening if allergic.
A newer threat in the region is the Asian needle ant. This invasive species nests in mulch and leaf litter. They are distinguished by their lack of pheromone trails, which makes them harder to detect. Their sting is extremely painful and can be life-threatening for individuals with allergies.
Why Some Ants Are More Aggressive
Defense Mechanisms
Ants are very protective of their colonies, which leads them to become aggressive if they become threatened. It is essential for ants to keep their queen safe. Over time, Acrobat ants, fire ants, and Asian needle ants have developed defense strategies to protect their nests. These include powerful stingers, strong mandibles, and chemical deterrents.
For example, fire ants inject their threats with venomous stingers causing a burning sensation and acrobat ants raise their heart-shaped abdomens to release a stinky odor. These defense mechanisms protect the ants from predators.
Competitive Advantage
Aggressive behavior isn’t always about protecting against potential threats, it also allows the ants to colonize in competitive environments. Colonies are more valuable based on size, nearby resources, or strategic location. Ants are likely to more aggressively protect colonies that are more valuable to them.
Invasive ants, such as the Argentine ant and the Asian needle ant, have been known to exhibit particularly hostile behaviors toward native ant populations. Their aggression helps them outcompete and displace local ant populations. This allows them to take over the nearby food sources and nesting sites. This skillset makes them difficult to control once established.
Social Colony Structure
There are different types of ant colony structures. If the colony is more complex with multiple queens, the ants may be more aggressive when protecting it. Colonies with multiple queens tend to grow rapidly and spread over large areas. This is the case with Argentine and Pharaoh ants, both of which are common in New Jersey. These supercolonies can contain millions of ants working together. Their cooperation allows for the rapid expansion of territory, but it also means that the colony will aggressively defend itself and compete fiercely for resources.
Venom Use
Venomous ants are more likely to be aggressive. Venom can be used by stinging ants to defend their colony or to hunt/immobilize prey. The potency of the ant venom depends on the species. The more potent the venom, the more confident and aggressive the ants tend to be when confronting perceived threats. Ants that can use their venom effectively can use it to assert dominance, scare off predators, and protect their territory more forcefully.
How to Identify an Ant Bite
If you are bitten or stung by an ant you might want to identify the culprit to help you manage your symptoms and prevent future bites. Below is a quick guide to help you determine what type of ant bit you.
Red flags: Seek medical help if you experience breathing difficulty, extensive swelling, or systemic symptoms following a bite, as allergic reactions can be life-threatening.
Protect Your Home and Family from Ants
Understanding the types of ants that inhabit New Jersey, their behaviors, and the risks they pose is the first step in effective pest management. From annoying kitchen invaders to stinging threats, it can be overwhelming trying to identify ants and their source if you are not a trained professional. At ELDER Pest Control, we are here to help protect your home and family from ants. Call us today to conduct a thorough inspection to identify the colony and create a treatment strategy to eliminate your ant problem. After all, no one likes to deal with itchy and painful ant bites!