There are dozens of ant species that live in Maine!

Trying to list them all would be impossible. 🙂

Below are the most common and abundant types of ants, which are part of the insect family Formicidae.

5 ANT SPECIES in Maine:

#1. Eastern Black Carpenter Ant

Camponotus pennsylvanicus

Adults are dull black and have distinctive white or yellowish hairs on their abdomens.
The largest workers are 0.2-0.6 inches (0.5-1.6 cm) long.
Non-worker reproductive males and females have wings.

Black Carpenter Ants are one of the most common ants in Maine.

You can find them in grasslands, deciduous forests, and urban and suburban areas. As their name suggests, they prefer to build their nests in wood, often using decaying logs, deciduous trees, or wood structures.

Eastern Black Carpenter Ants aren’t picky eaters and feed on other insects, trash, nectar, fruit, and fungi.

These ants are surprisingly long-lived! While reproductive males usually die shortly after mating, workers may live for seven or more years. Queens can live for over ten years.

#2. Immigrant Pavement Ant

Tetramorium immigrans

Workers are dark brown to blackish.
They have longitudinal, parallel ridges on their head and thorax.

Immigrant Pavement Ants thrive in urban areas of Maine. These European natives like building underground nests in areas with little vegetation. Consequently, you’ll often see them nesting near sidewalks, patios, foundations, and pavement.

Each of about 1000 ants defends a territory of around 460 square feet (43 m2). It’s common to see colonies battling for territory boundaries, especially in spring, as new colonies are established. The workers also forage for honeydew excreted by aphids, seeds, insects, fruit, and human food like bread and cheese.

Gardeners may be happy to see immigrant pavement ants around their property since they are significant predators of coddling moth larvae, a major agricultural pest in North America.

#3. Odorous House Ant

Tapinoma sessile

Odorous House Ant (Tapinoma sessile) — Photo by judygva

Adult workers are usually a uniform color ranging from brown to black.
They have a distinct rotten odor when crushed.

Odorous house ants are incredibly widespread because they can adapt to nearly any habitat in North America. They tolerate various habitats from sea level to 13,000 feet (4000 m) of elevation and occupy urban areas, forests, grasslands, bogs, and sandy coastal areas.

These ants are also commonly seen in homes in Maine.

And they aren’t just searching for a comfortable place to live; odorous house ants love sweets! In the wild, they tend to feed on aphid honeydew and flower nectar, but they will gladly take advantage of human food when available.

They often nest outside on stumps, rocks, matted grass, and other debris but use cracks and termite-damaged wood found in homes. Interestingly, these nests aren’t stationary.

Odorous house ants tend to move their nests about every 21 days. They also tend to coexist peacefully with other ant species rather than strictly defend a territory.

#4. New York Carpenter Ant

Camponotus novaeboracensis

New York Carpenter Ant (Camponotus novaeboracensis) — Photo by bugeyedbernie

Workers are large and may grow up to 0.62 inches (16 mm) long.
Their abdomens and heads are black, while their thorax or body is red or reddish-brown.
Their legs are a dark reddish-brown.

New York carpenter ants may be the fastest-growing ant species in Maine! They occur in moist woodlands, on the edges of bogs, and in wetlands. As their name suggests, they prefer to build their nests in wood. Usually, they create tunnels in stumps, logs, or old houses.

While they don’t eat wood, only tunnel and nest in it, they have voracious appetites! New York carpenter ants will feed on almost anything they find, including carrion, beetle larvae, honeydew, flower nectar, human scraps, and other insects like roaches and fruit flies.

Watch the video below to see them collect honeydew from aphids!

#5. Allegheny Mound Ant

Formica exsectoides

Allegheny Mound Ant (Formica exsectoides) — peterwchen, CC BY 4.0, via Wikimedia Commons

Workers’ heads and thoraxes or bodies are reddish-orange, while their abdomens are brownish-black.
The rear margins of their heads are concave.
Workers are relatively small but may reach 0.25 inches (6.4 mm) long.

Allegheny mound ants build some of the largest mounds of any ant in Maine!

These impressive mounds of soil can reach 3-9 ft (0.9-2.7 m) in diameter and about 2 ft (0.6 m) tall, though some historical records indicate even larger mounds.

These mounds serve primarily as protection for the queens and an incubating chamber for eggs and larvae. They have tunnels that may also extend about four feet into the ground.

Allegheny mound ants show a strong preference for open, sunny habitats. They tend to nest on strip mines and ridge tops. They also work hard to keep their territory open and free of brush or other plants.

These ants inject formic acid into trees and shrubs, killing any vegetation within 40-50 ft (12-15 m) of their mounds.

They sometimes form supercolonies in ideal habitats with interconnected mounds spread over a fairly large territory. These supercolonies can contain millions of ants and may persist for decades!

Did you like learning about the ants that live in Maine?

Check out these ID guides focusing specifically on different insects and arachnids in Maine

Do you need additional help identifying ants in Maine?

If so, check out this excellent ID guide!

National Audubon Society Field Guide to Insects of North America

5 Types of ANTS found in Maine!