Can I move plants if my section has Argentine ants?

Northland's rules say no one may knowingly move material that may harbour them without first taking suitable control measures. Before moving plants or soil in any quantity, talk to Northland Regional Council's biosecurity team.

Do I need a pest business for a paper wasp nest?

Leave the nest alone either way. Northland Regional Council suggests a specialist pest management firm if you have several nests. For one nest near a doorway, path or play area, we'd get it looked at.

How do I tell an Argentine ant from other ants?

Colour and size are the first clues. They're honey-brown and only 2 to 3 mm long, where DOC says most ants you'll see here are black. Look for wide trails, five or more ants across, and ants heading up tree trunks.

Pest control Whangārei: ants, wasps and mild winters

What's different in Whangārei

Argentine ants are widespread

Northland Regional Council says they're widespread in Northland and favour sandy coastal and volcanic soils. DOC calls them a major household and garden pest that can bite people.

They travel with us

The regional council says people move them around Northland in potted plants, beehives and soil. A pot from a friend's garden can carry a nest to yours.

A rule about moving them

Northland's pest rules say no one may knowingly move material or equipment that may harbour Argentine or Darwin's ants without first taking suitable control measures. If you know your section has them, think before you shift pots, soil or gear.

Rarely frosty

NIWA says air frosts are rare in most parts of Northland, with warm, humid summers. Whangārei Airport's 9 am humidity averages 83%, and it sees 11 days of fog a year. There isn't much cold to slow insects down.

Both paper wasps

Asian paper wasps are found in the North Island and the top of the South Island, while Australian paper wasps are confined to the north of the North Island. The regional council says Asian paper wasp nests are often built above ground on houses or other buildings, and it doesn't run a management programme for them.

Pest work in the city

Northland Regional Council and NorthTec formed a partnership in July 2018 to develop an urban pest management programme for Whangārei, starting with pest mammal control. The council's biosecurity team takes enquiries.

Who do you call about a wasp nest?

It depends whose land it's on. Northland Regional Council says nests in district council parks and reserves go to the district council, so that's Whangārei District Council, and nests on DOC land go to DOC. If you've got several nests on your own section, it suggests a specialist pest management firm.

Paper wasps are calmer than German and common wasps, but the council warns that getting close to an Asian paper wasp nest can provoke repeated stings. A nest over the back door or a path deserves a look by a pest business. One high in a shrub you never go near can usually wait while you ask.

One to report, not treat

Northland Regional Council says the yellow-legged hornet isn't known to be established in New Zealand, but Biosecurity New Zealand has found queens and nests in Auckland since October 2025. It has dark legs with bright yellow tips. Don't go near a suspected hornet or nest. Report it on the Pest and Disease hotline.

The same number takes suspected termites, and those need the same care: if you find mud packed into timber, don't disturb it.

Before you bring pots, soil or mulch home

Lift each pot and look underneath for a line of small honey-brown ants.
Check the potting mix, bark and mulch as well as the pot.
Ask the neighbour or the nursery whether they've had Argentine ants.
Moving house? Check pots and garden gear before they go on the truck.
If your own section has them, ask the regional council's biosecurity team what suitable control looks like before you move anything in bulk.

Warm kitchens and winter rats

Health NZ says cockroaches thrive in warm and damp conditions, hiding inside walls, behind appliances and in cupboards. Rats and mice still come indoors over winter even where it rarely freezes, and Tenancy Services names winter as the more common time. Fleas are very common across New Zealand with cats and dogs, Health NZ says. See cockroach control and flea treatment.

Our take on pests in Whangārei

We'd find out which ant it is before anything else. A trail of honey-brown Argentine ants is a colony problem that may run under the fence, and a few black ants in the sugar usually isn't. Tap what you've seen, say whether the neighbours have them too, and let the pest business confirm it.

Want someone to look at it?

Tell us what you've seen and your postcode, and a local pest business that handles exactly that calls you to talk it through.

What have you seen?

Pest control in Whangārei

Pest control in Whangārei: what to know before anyone calls