24% of Dutch honeybee colonies died last winter, peaking at 41.5% in Groningen
New beekeeper survey data shows 4 straight years above 20% mortality, with stark regional gaps that ripple through food systems.
An annual survey of Dutch beekeepers reports that 24% of Dutch honeybee colonies were lost during the winter of 2025-2026. The fourth consecutive year above 20% winter mortality, plus regional extremes like Groningen at 41.5% and Overijssel at 16.9%, creates mounting operational and policy pressure.
During the winter of 2025-2026, 24% of Dutch honeybee colonies were lost, according to the annual survey of Dutch beekeepers. That is not a one-off bad season. It keeps an upward trend in winter mortality moving, and it lands as the fourth consecutive year in which winter mortality has exceeded 20%.
Those headline numbers matter because winter mortality is the part of the bee year that is hard to “make up later.” Bees do not simply reboot in spring at the same rate, especially when colonies are already weakened at the worst possible time. When nearly a quarter of colonies vanish, the downstream effects show up in pollination capacity, farm planning, and the practical question of whether managed pollinators will be available when crops need them most.
The survey also shows something executives love and regulators should care about: the problem is not uniform. There are substantial regional differences across the Netherlands. Groningen recorded the highest winter losses, at 41.5%, while Overijssel had the lowest figure, at 16.9%. That spread is wide enough to suggest that local conditions, exposure patterns, or beekeeping practices are not just noise. It is a signal that “one national solution” might miss the drivers that are most damaging in specific geographies.
For decision-makers in agriculture-adjacent industries, the second-order issue is continuity. Pollination is not a one-time input like fertilizer you can reorder later. It is a capability that depends on surviving colonies entering the spring buildup cycle. With four straight years above 20% winter mortality, the baseline risk is rising. Even if any single winter varies, the system is increasingly operating with a smaller margin for error.
This matters to anyone making plans around crop yields, supply contracts, and sustainability commitments. If winter survival becomes a repeating constraint, farms, growers, and businesses that rely on pollination services may need to think earlier about contingency planning, geographic sourcing, and stakeholder coordination. The survey’s regional split, especially Groningen’s 41.5% loss versus Overijssel’s 16.9%, underscores that contingency planning may not be equally transferable across regions. In practical terms, the “risk map” for pollination is becoming more uneven.
There is also a policy and compliance angle, even though the source is focused on survey results rather than regulation. In Europe, bees are often discussed in the context of environmental protection, pesticide risk, habitat support, and integrated pest management. When mortality stays above 20% for multiple consecutive winters, it tends to put more pressure on policymakers and industry groups to justify current approaches and to prioritize evidence-based interventions. The data gives regulators something concrete to respond to, not just general concern.
Finally, the story is a reminder for executives who oversee food system resilience. Honeybee colonies are a living asset. They cannot be scaled instantly like capacity on a spreadsheet. When the loss rate is as high as 24% overall and spikes to 41.5% in Groningen, the strategic stakes move from “background risk” to “board-level operational continuity.” The question is no longer whether a harsh winter can hurt. It is whether the system can sustain itself season after season when winter mortality repeatedly exceeds 20%.
For companies and institutions managing agricultural partnerships, risk teams, or sustainability reporting, the takeaway is simple: treat winter survival as a leading indicator, not a historical footnote. And when the same country shows a near 25-point difference between Groningen and Overijssel, treat the geography as part of the problem, not an afterthought.
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