Ant explainers

These explainers answer the things people ask once the first trail has turned into a summer-long problem: why it keeps coming back, what the ants are, where they live, what's safe around children and animals, and what a fair treatment looks like. Each one gives the short answer first, then the detail, and points to the service page if you decide you want a technician to look.

All explainers

Every explainer on the site, newest first within each topic. They are written for Auckland conditions, using New Zealand sources wherever they exist.

• Ants and pets

  Ants in the dog or cat bowl? Simple ways to protect pet food in Auckland homes, which ant products to keep pets away from, and what to ask before a treatment.

• Hauraki Gulf islands

  Heading to Waiheke, Kawau or Aotea? The Auckland pest plan bans moving Argentine ants into the Hauraki Gulf. What to check in bags, boats and building supplies.

• Chickens and beehives

  Argentine ants kill poultry hatchlings and rob beehives, says Auckland Council. How to protect coops and hives, and how ant treatment is done safely around them.

• Ants in power points

  Ants coming out of a power point or light switch usually means a nest in the wall cavity. Why they're there, the electrical risks, and how it's treated safely.

• Ants, aphids and scale

  Ants running up the citrus or roses? How ants farm aphids, scale and mealybugs for honeydew, why sooty mould follows, and how controlling ants helps the garden.

• Food businesses and ants

  Ants in a cafe, takeaway or commercial kitchen in Auckland: what the Food Act 2014 expects, daily habits that help, and what a commercial ant visit looks like.

• Ants in the bathroom

  Why ants turn up in Auckland bathrooms, showers and laundries: moisture, wall cavities and pipe gaps. What to check, what to avoid and how it's treated.

• Ants in winter

  Most Auckland ants slow down in winter, but some stay busy indoors. Why heated walls keep colonies active, which species do it, and the best time to act.

• Argentine ant season

  Why Argentine ant trails explode in Auckland from November to March, what Landcare Research found about temperature and baiting, and what to do before the peak.

• Fire ants

  Red imported fire ants are notifiable in New Zealand. How they differ from Auckland house ants, the past incursions, and how to report a suspected nest to MPI.

• How colonies work

  Queens, workers, winged males, nuptial flights, budding and supercolonies: how ant colonies work, and why killing the visible trail rarely ends an ant problem.

• How long treatment takes

  A realistic timeline after an ant treatment in Auckland: why there are more ants at first, when numbers drop, when a follow-up is due and when to ask for a recheck.

• Auckland's Argentine ant story

  From the first find at Mt Smart in 1990 to the Auckland pest plan rules and the Hauraki Gulf island programmes: how Argentine ants became Auckland's ant.

• Moving plants and soil

  Pot plants, soil, mulch and bark are how Argentine and Darwin's ants spread around Auckland. Council's two-minute soak and other checks before you move.

• Native ants

  New Zealand's 11 native ants live in bush, soil and leaf litter and rarely come inside. How to recognise them and why bush-edge gardens shouldn't be blanket-sprayed.

• Preparing for a treatment

  How to get ready for an ant treatment in Auckland: leave the trail, keep the packets, clear under the sink, sort pets and access. A short checklist.

• Reading an ant quote

  What a good written ant control quote should name: areas treated, product types, follow-ups, GST and re-entry times, with published Auckland price ranges.

• Shop products and labels

  Gels, liquids, granules, sprays and dusts from the supermarket: what each does, how to read the label, the HSNO Act, safe storage and when to stop trying.

• Telling house ants apart

  Argentine, black house, white-footed or Darwin's ant? Practical field marks for Auckland's four common indoor ants, and why the species changes the treatment.

• Ants after rain

  A downpour and suddenly ants in the pantry? Why saturated soil drives colonies indoors in Auckland, how long it lasts, and when it signals a real infestation.

• Ants in new builds

  Brand-new home and already ants? How slab edges, cladding cavities, service gaps and landscaping bring ants into new Auckland builds, and what to check first.

• Why sprays scatter ants

  Sprayed the trail and the ants came back worse? How repellent sprays split many-queen colonies like Argentine ants, and what works better in Auckland homes.

How these are written

Each explainer starts from a primary New Zealand source: Manaaki Whenua Landcare Research for ant biology and control, Auckland Council's pest plan for local rules, the Ministry for Primary Industries for fire ants and biosecurity, Tenancy Services for rentals and the National Poisons Centre for safety. Where we give general practice rather than a cited fact, we say so.

Prices quoted in explainers come from figures Auckland pest control businesses publish themselves, gathered on the cost page with dates and links. We don't name brands of pest product, and we don't rank companies. If something here is out of date or wrong, email [email protected] and we'll check it.

Where to start

If ants have just appeared, start with Argentine ant season and telling house ants apart. If you've already sprayed and they came back, read why sprays scatter ants. If you're about to book, preparing for a treatment and reading an ant quote will save time on the day.

Checked 5 November 2026