Asian Needle Ant (Brachyponera chinensis) — identification, habitat & look-alikes

The Asian needle ant is a slender, dark ant from East Asia with a painful sting. First found in the U.S. in 1932, it has spread to at least 20 states and pushes out native ants in Southeastern forests.

Appearance

Appearance: Workers are about 1/6–1/5 in (4–5 mm) long, longer and thinner than most common ants. The body is shiny dark brown to black, with lighter brown to orange legs and jaws. Workers and queens look very much alike.

Look-alikes

Carpenter antsCamponotus

Carpenter ants are noticeably bigger and bulkier. Asian needle ants are smaller, long and slim, with orange-brown legs.

Why they get mixed upBoth are dark ants found around logs and houses.

Velvet antsMutillidae

Velvet ants are really wingless wasps, and their antennae are not elbowed. The needle ant has .

Why they get mixed upBoth are ant-shaped insects that sting.

Where it lives

Typical habitats: Woodland logs and leaf litter
Mulch and flower beds
Lawns and yards
Range: Native to East Asia, including Japan, the Korean Peninsula, and China. In the U.S. it is most common in the South and along the East Coast from Florida to Massachusetts, west to Kentucky, Tennessee, and Arkansas, with outlier populations in Washington and Wisconsin. North Carolina, South Carolina, and Georgia have the heaviest infestations.
Preferred conditions: Likes moist, shady spots: rotting logs, leaf litter, under rocks, loose soil, mulch, potted plants, and pavement cracks. Unlike many pest ants, it moves into undisturbed forests as well as yards.

Behavior

Diet: Prefers termites, but also hunts or scavenges crickets, roaches, beetles, spiders, earthworms, and other dead creatures, and is drawn to sweets and trash bins.
Activity: Most active when days are warmer than about 65°F (18°C), peaking in August. Workers forage alone or in loose groups instead of marching in trails, so they're easy to miss.
Social life: Colonies are small, from a few dozen to a few thousand ants, but one colony may spread over several nests around a tree or in nearby logs. Workers can't climb smooth surfaces like glass.

Life cycle

Reproduction: Winged males and new queens leave the nest to mate. A mated queen sheds her wings, digs into the soil, and starts a new colony.

Cautions

Cautions: Not aggressive, but it stings when pressed against skin, often while people are gardening, moving logs, or handling mulch. The sting causes painful, itchy welts and can trigger in people allergic to insect venom. Thick gloves help.

Name and classification

About the name: Many U.S. publications, including older extension guides, call it Pachycondyla chinensis, its name until about 2014.

Conservation

IUCN Red List: NENot EvaluatedNot yet assessed
Status: The European Union bans importing, keeping, or releasing it as an invasive species of Union concern.
Threats: In invaded forests it outnumbers native ants, and one native woodland ant (Aphaenogaster rudis) fell by 96%. Because native ants spread the seeds of many woodland wildflowers, invaded forests see less seed dispersal.