North America Bee Swarm Season Starts 17 Days Early as Warm Winters Fuel Mite Risks
Updated
Updated · The Guardian · May 17
North America Bee Swarm Season Starts 17 Days Early as Warm Winters Fuel Mite Risks
3 articles · Updated · The Guardian · May 17
Swarmed data from more than 10,000 beekeepers shows North America’s 2026 bee swarm season began 17 days earlier than last year after record US heatwaves and an unusually warm winter.
California colonies were already building in December and January, experts said, as earlier blooms and shorter winters pushed hives to mature and reproduce sooner.
Warmer winters may also worsen Varroa infestations by letting bees lay eggs year-round, giving the parasite—already showing chemical resistance—more chances to reproduce and spread viruses.
The shift follows the largest recorded US honeybee die-off, with beekeepers losing more than 60% of colonies last year, raising pressure on pollination-dependent agriculture and forcing beekeepers to rethink inspection and swarm management schedules.
Experts said the changes could ripple beyond honey production because managed honeybees support crop pollination and wider ecosystems, even as dense honeybee populations can intensify competition with already-declining wild bees.
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Early 2026 Bee Swarm Surge and Varroa Mite Resistance Drive Record Honeybee Losses in North America
Overview
The 2026 bee swarm season in North America brings major challenges for beekeepers, who must quickly adjust their management practices. Experts stress the need to adapt inspection schedules and strategies to match new seasonal patterns, as healthy, managed bee populations are vital for agriculture and ecosystems. These changes are urgent because early swarming is part of a larger crisis, with significant honeybee colony losses making it harder to keep bees productive and healthy. Rapid adaptation is essential to ensure bees continue to support food production and maintain the balance of natural systems.