National Invasive Ants Programme

Early detection is the key to the eradication and control of exotic invasive ants in New Zealand…

Summary of Fact Sheet by Biosecurity NZ (click to view full factsheet)

This factsheet outlines species of exotic ants, their impact and biology, and how to recognise and report them. If you see any of these ants, please contact the Biosecurity New Zealand pest and disease hotline on:

0800 80 99 66 or report.mpi.govt.nz/pest

Red Imported Fire Ant (Solenopsis Invicta)

Reddish-brown color, 3–6mm in size, some with shiny black abdomens.
Aggressive stinging behavior can disrupt agriculture and natural environments.
Nests are mounded, up to 40cm high, in sunny areas.
Sting causes intense burning, itching, and blistering; seek medical help for allergic reactions.

Tropical Fire Ant (Solenopsis geminata)

Orange-brown body, 3–6mm in length, similar to red imported fire ant.
Inflicts painful stings and swarms aggressively when disturbed.
Prefers open sunny areas for nesting, often near heat sources.
Sting can cause intense burning and allergic reactions; seek medical attention if symptoms develop.

Little Fire Ant (Wasmannia auropunctata)

Tiny, 1.5mm long, reddish to golden brown.
Disrupts agriculture and recreational activities with aggressive stinging.
Nests in twigs, leaf litter, and trees, making eradication difficult.
Sting is usually harmless, but can be painful and itchy for up to three days.

Carpenter Ant (Camponotus sp.)

Large ants, up to 13mm long, dark to rusty orange in color.
A major urban pest known for chewing wood and leaving sawdust.
Generalist hunters and scavengers, collecting nectar and protecting honeydew-producing insects.
Inflicts painful bites.

Singapore Ant (Monomorium destructor)

Two-toned, orange thorax and dark abdomen, 1.8-3.5mm in length.
Major urban pest that damages fabric, rubber goods, and insulation.
Forms large colonies with multiple queens, nesting inside and outside buildings.
Can inflict painful bites.

Crazy Ant (Paratrechina longicornis)

Dark brown to black, 2.5-3mm in size, with long legs and antennae.
Protects sap-sucking insects, potentially disrupting the ecosystem.
Nests in warm places, including inside buildings and under debris.
May bite if provoked.

Ghost Ant (Tapinoma melanocephalum)

Tiny, 1.5 to 2mm long, with a dark head and pale abdomen.
Serious household nuisance, foraging for sweet foods in large numbers.
Quick, erratic movements when disturbed; emits a coconut-like odor when crushed.
No sting or bite.

Yellow Crazy Ant (Anoplolepis gracilipes)

Pale-yellow color, 4–5mm in length, with long legs and antennae.
Major agricultural and environmental pest, protecting sap-sucking insects.
Nests at the base of trees and plants, and can occupy houses.
Does not sting but may spray formic acid, causing localized irritation.

Ant Control Products

PMANZ

PMANZ is an association run by pest managers for pest managers. The association was formed in 1976 to provide a unified voice when important issues arose that required our industry’s input.

The Pest Management Association of New Zealand (PMANZ) is a leading organization dedicated to promoting effective pest management practices across the country. Comprised of professional pest control companies, PMANZ strives to protect the health, environment, and economic well-being of New Zealand through the responsible management of pests. With a commitment to sustainability, PMANZ emphasizes the use of safe and environmentally friendly pest control methods. Through education, training, and advocacy, the association ensures its members are equipped with the latest knowledge and techniques to tackle pest infestations efficiently. PMANZ is a trusted resource for individuals and businesses seeking reliable pest management services in New Zealand.

Relevant Training Courses

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