Exotic termites in New Zealand
Exotic termite infestations have occurred from time to time in New Zealand, with different invasive termites found in homes, gardens, and on boats.
The infestations have been linked to imported timber and boats that have travelled internationally. Biosecurity New Zealand has successfully treated affected sites and continues to monitor them for infestation.
What are exotic termites?
Introduced non-native termites are wood-boring insects that can:
- cause structural damage to wood in any form, including treated timbers, hardwoods, and softwoods
- attack plywood and timbers that are considered resistant to native termites
- attack dry wood in trees and plants.
The main concern is their ability to destroy man-made wooden structures like boats, house framing, furniture, and fences.
Risk to New Zealand
Exotic termites are classed as an unwanted pest in New Zealand. Exotic termites have been found in vessels which have come to New Zealand after international travel and in some North Island homes.
Exotic termites can be difficult to find. They can live in wooden structures for up to 5 years before mature termites (alates) emerge. It is often at this point that they are detected. By then they may already have spread and caused a large amount of damage.
New Zealand has 3 species of native termites that are not considered to be destructive and do not form large colonies.
Previous infestations of exotic termites
Most recent infestations of exotic termites in New Zealand have occurred on boats arriving from overseas.
Since 2020, there have been 10 such infestations, with the most recent detection in February 2026. Earlier infestations of exotic termites have been declared eliminated following a period of treatment and monitoring.
Infestations primarily involve 2 exotic species of drywood termites – Incisitermes minor and Cryptotermes brevis.
In 2021, some residential houses in Auckland were found to be infested with Australian subterranean termites (Coptotermes acinaciformis). The houses were treated and monitoring continues.
Termite treatment methods
Infestations are treated using fumigants, localised insecticides, heat, or baiting systems.
Infestations of exotic termites on boats are usually fumigated or heat-treated, depending on the size of the boat.
For land-based infestations, a mix of above- and below-ground baiting stations is used to eradicate the termite colony. These are monitored intensely until no termite activity is seen for 3 months. Monitoring can continue for up to 5 years before eradication can be declared.
Tell us if you see any signs of these pests
We need your help to report signs of exotic termite infestation. The earlier new colonies are found, the greater the chance of successful eradication.
Signs of termite presence include their droppings, alates, and their discarded wings.
Termite droppings
Winged termites
Alate wings
What to do if you suspect a termite colony
Photograph and report findings to Biosecurity New Zealand’s exotic pest and disease hotline on 0800 809 966
You can also report sightings using our online form.
