When the results of the Canada’s national honey bee colony loss survey were published in July 2025, they came as no surprise. According to the Canadian Association of Professional Apiculturists, an estimated 36 per cent of Canada’s 830,000 honey bee colonies had perished over the winter.

These figures used to make headlines. But after almost two decades of the same story ― colonies dying in the winter, beekeepers struggling to rebuild, somewhat succeeding, rinse and repeat ― the sad statistics are no longer news, and we are still working out why the cycle persists.

Now, we might be having a light-bulb moment. My colleague Abigail Chapman and I recently found that queen honey bees are infected with viruses that compromise their fertility and may get them ousted from their colonies. And that’s meaningful, because “poor queens” is the top-ranked cause of colony losses reported by Canadian beekeepers.

A typical honey bee colony has a single queen at the helm, and she is solely responsible for laying thousands of eggs per day ― more than her own body weight ― to grow and replenish the colony’s population for years.

A healthy, productive queen also secretes pheromones that, like a chemical bouquet,

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