A small handful of islands around the world have gone their entire beekeeping history without ever recording Varroa destructor, the parasitic mite that devastates managed honeybee colonies almost everywhere else — and Australia’s famous Kangaroo Island sanctuary, under direct threat since varroa reached the South Australian mainland in September 2025, has held the line for a full year since. These places aren’t varroa-free by luck; they’re varroa-free because of geographic isolation reinforced by real, enforced law, and watching how each one is currently holding the line says more about the mite’s reach than any national statistic does.
Key Takeaways
- Kangaroo Island, Australia — home to the world’s purest remaining population of the Ligurian honeybee since 1885 — remains varroa-free as of this writing, more than a year after the mite reached South Australia’s Riverland region, thanks to a strait crossing and stepped-up ferry biosecurity checks now covering 100 percent of arrivals.
- The Isle of Man was officially declared varroa-free in 2015 and remains the only part of the British Isles with that legal status, maintained through the Importation of Bees Order 2025, which replaced legislation dating back to 1988.
- Scotland’s Colonsay and Oronsay were legally designated a native black bee reserve in 2013 specifically because their isolated Apis mellifera mellifera population, now around 50 colonies, was both genetically pure and varroa-free.
- All three sanctuaries rely on the same core mechanism: a defined geographic boundary (a sea crossing) combined with a legally enforced ban on importing bees, equipment, or unprocessed hive products that could carry the mite in.
- None of this is guaranteed to last — Kangaroo Island’s ongoing scare shows that even a well-defended sanctuary is only ever one accidental shipment away from losing a status it’s held for well over a century.
Table of Contents
- Three Sanctuaries Compared
- Kangaroo Island: 140 Years, Now Under Threat
- Isle of Man: Officially Certified Since 2015
- Colonsay and Oronsay: Purity and Protection Together
- Why Isolation Is the Only Thing That Actually Works
- Frequently Asked Questions
Three Sanctuaries Compared
| Sanctuary | Protected since | Bee population protected | Legal mechanism | Varroa status (2026) |
|---|---|---|---|---|
| Kangaroo Island, Australia | 1885 (Ligurian Bee Act) | Pure Italian/Ligurian bee (Apis mellifera ligustica) | State legislation banning other bee races; 100% ferry biosecurity checks | Free, but under active, sustained threat since South Australia’s first mainland detection |
| Isle of Man, British Isles | Officially declared 2015 | General managed honeybee population | Importation of Bees Order 2025, banning live bees, used equipment, and unprocessed hive products | Free; only officially varroa-free part of the British Isles |
| Colonsay & Oronsay, Scotland | 2013 (Bee Keeping Order) | Native dark European bee (Apis mellifera mellifera), ~50 colonies | Order banning any non-native honeybee on the islands | Free |
Kangaroo Island: 140 Years, Now Under Threat
Kangaroo Island’s bee sanctuary is the oldest of its kind in the world. In 1885, South Australia’s Parliament passed the Ligurian Bee Act specifically to protect the island’s imported Italian Ligurian bees from cross-breeding with other races — and in the process, created a legal barrier that has also kept every subsequent honeybee pest and disease off the island for well over a century, simply because no other bees have been allowed in.
That run is now being tested, and has been for over a year. Varroa mite reached mainland Australia via the Port of Newcastle in 2022, and after eradication efforts were abandoned in 2023, the mite continued spreading through New South Wales, Victoria, Queensland, and, in September 2025, South Australia’s Riverland region — putting it within reach of Kangaroo Island for the first time. Biosecurity authorities responded by expanding the island’s network of early-warning sentinel hives from four to ten and moving to inspect every ferry arriving on the island.
This ABC News Stateline segment, filmed shortly after varroa’s detection on the South Australian mainland, covers the scale of what Kangaroo Island’s beekeepers and the state government were racing to protect and why the island’s genetics can’t simply be replaced if the mite gets through.
South Australia’s Primary Industries Minister confirmed the ferry checks reached full coverage within weeks of the mainland detection.
“We now have 100 per cent coverage.” — Clare Scriven, South Australian Minister for Primary Industries, quoted by ABC News, October 8, 2025
Local beekeepers, while welcoming the response, have been candid that biosecurity awareness should have been a priority long before the mite ever reached Australia at all.
“It probably should have been happening even well before varroa came into Australia.” — Shawn Hinves, Kangaroo Island Living Honey, quoted by ABC News, October 8, 2025
As of this writing in 2026, Kangaroo Island remains varroa-free — but its buffer has never been thinner, and authorities have been explicit that the mite’s regional spread, including newer, treatment-resistant populations confirmed elsewhere in Queensland and New South Wales in 2026, means the underlying pressure isn’t going away.
Isle of Man: Officially Certified Since 2015
The Isle of Man’s varroa-free status is more recent than Kangaroo Island’s but no less deliberately maintained. The island was officially declared free of varroa in 2015 under EU Council Decision 2015/266, and it remains the only part of the British Isles — a group of islands where varroa has been present on the mainland UK since 1992 — to hold that status today. The island is also free of foulbrood, Tropilaelaps mites, and small hive beetle.
The Isle of Man’s government has continued actively updating its protective legislation: the Importation of Bees Order 2025 now governs bee biosecurity on the island, replacing rules that dated back to 1988, and reinforces a long-standing ban on bringing in live bees at any life stage, used beekeeping equipment, and unprocessed apiculture by-products like raw honey, pollen, and beeswax that haven’t been processed for human consumption. Every beekeeper on the island must also register their hives and receive a formal “Bee Holding Number,” and routine low-level check testing continues specifically to confirm the status holds. Unlike Kangaroo Island’s geographic head start, the Isle of Man’s protection is a case of a jurisdiction actively choosing isolation as policy well after most of its neighbors had already lost the fight.
Colonsay and Oronsay: Purity and Protection Together
The Hebridean islands of Colonsay and Oronsay were designated Britain’s first native honeybee reserve under the Bee Keeping (Colonsay and Oronsay) Order 2013, which took effect on 1 January 2014. The legislation makes it an offense to keep any honeybee on the islands other than the native dark European bee, Apis mellifera mellifera — a subspecies that has been displaced or genetically diluted across most of its original range by imported Italian and Carniolan stock.
What makes Colonsay distinct from the other two sanctuaries is that its protection serves two goals simultaneously: preserving one of Europe’s few remaining genetically pure populations of the native dark bee, currently around 50 colonies, and — because that same isolation blocks any incoming colony that might carry it — keeping the islands varroa-free as a direct side effect. Because varroacide treatments have never been needed or used on the reserve, the site has also become a place where researchers can study a genuinely untreated, historically representative population of A. m. mellifera, a resource for honeybee genetics and disease-resistance research more broadly, as the Scottish Native Honey Bee Society documents in detail.
Why Isolation Is the Only Thing That Actually Works
Every treatment developed against Varroa destructor — oxalic acid, formic acid, thymol, and the newer options beekeepers have available in 2026 — exists because chemical and genetic control is the only option once the mite has arrived. None of it eradicates the mite from a region once it’s established; it only manages an ongoing infestation. The three sanctuaries above show the one strategy that actually prevents infestation in the first place, and it isn’t a product or a technique — it’s a hard geographic boundary paired with a legally enforced ban on the ordinary channels (live bee sales, used equipment, unprocessed hive products) that carry mites between regions.
That also explains why the list of varroa-free places has only ever shrunk, never grown. Every documented loss of varroa-free status worldwide has traced back to a single breach in that boundary — an illegally imported package of bees, a swarm hitching a ride on cargo, a beekeeper moving equipment across a border that looked like a formality until it wasn’t. Kangaroo Island’s sustained, multi-year scramble to reinforce ferry checks is exactly that pattern playing out in real time, not a new kind of threat.
Frequently Asked Questions
Are there any varroa-free places left in mainland regions, not just islands?
Effectively no. Every currently documented varroa-free honeybee population of any size is protected by a genuine geographic barrier — typically an island separated from infested mainland areas — because a land border alone has proven too porous to stop the mite’s spread.
Is Kangaroo Island still varroa-free right now?
Yes, as of this writing in 2026 — more than a year after varroa’s detection on the South Australian mainland. Authorities have described the threat as ongoing rather than resolved, particularly given newer treatment-resistant mite populations confirmed elsewhere in Australia, and the island’s biosecurity measures remain at full, sustained coverage.
Why does it matter if a region loses its varroa-free status?
Once varroa arrives, colonies typically require ongoing chemical or biological mite treatment to survive; wild and feral bee populations without any management often collapse or decline sharply, as happened across much of the UK and US after varroa’s arrival there in the 1990s.
Can Varroa mites be permanently eradicated once they reach a region?
In practice, no region has successfully eradicated an established varroa population once it has spread beyond a very limited initial detection area; Australia’s own eradication effort was abandoned in 2023 after the mite proved too widespread to contain.
What legally protects the Isle of Man’s varroa-free status today?
The Importation of Bees Order 2025, which replaced legislation dating back to 1988 and bans importing live bees at any life stage, used beekeeping equipment, and unprocessed hive products — beekeepers must also register their hives with the government under a formal holding-number system.
