“Earring” Spies: Biosecurity NZ Deploys Tiny Tech in War Against Invasive Hornets
By Lions Roar News Environmental Desk
AUCKLAND, NEW ZEALAND (Tuesday, January 20, 2026) — Biosecurity New Zealand has introduced a sophisticated new weapon in the battle against the yellow-legged hornet (Vespa velutina) on Auckland’s North Shore: tiny, “earring-sized” radio transmitters.
The high-tech trackers, imported from the Netherlands, weigh less than 160mg—light enough to be glued to a worker hornet without grounding it—and are proving to be a game-changer in locating the hidden nests of this aggressive apex predator.
📡 How the “Hornet Spies” Work
The operation, centered in the Glenfield and Birkdale areas, involves a meticulous “track and trace” method that sounds like something out of a spy novel:
- The Lure: Worker hornets are attracted to feeding stations.
- The Tag: Experts carefully attach a 160mg radio transmitter to the hornet’s thorax.
- The Hunt: Biosecurity teams use radio receivers to follow the signal through dense bush and residential gardens, leading them straight to the nest.
- Thermal Backup: Once a signal leads to a suspected tree, thermal drones are deployed to see through the foliage and confirm the exact location of the heat-generating nest.
🐝 A Threat to Aotearoa’s Bees
The yellow-legged hornet is a major biosecurity threat because it specializes in preying on honeybees and wild bee populations. If they were to become established, it could devastate New Zealand’s multi-million dollar honey industry and agricultural pollination.
- The Toll So Far: Since October, 43 queen hornets have been captured.
- Recent Success: In just the last three weeks, three nests and hundreds of workers have been destroyed thanks to the new tracking technology.
💰 The $3 Million Eradication Effort
Biosecurity Commissioner Mike Inglis revealed that between $2 million and $3 million has already been invested in the response.
“It’s a heavy investment, but it’s absolutely worth it to make sure we’re on top of this and we eradicate the hornet,” Inglis said.
The operation is a massive logistical undertaking involving 170 dedicated staff and over 575 local beekeepers who are patrolling an 11km search zone on the North Shore. To further bolster the effort, two specialists from the United Kingdom—who deal with annual hornet incursions from Europe—arrived this week to provide expert tactical advice on destroying secondary nests in tall trees.
📊 Operation Hornet: By the Numbers
| Metric | Detail |
| Total Queens Found | 43 (since Oct 2025) |
| Transmitter Weight | < 160mg |
| Public Reports | ~10,000 sightings this summer |
| Staffing | 170 core staff + 575 beekeepers |
| Primary Zone | Glenfield / Birkdale (North Shore) |
