Experts sound alarm as North America’s bees start swarm season unusually early | Bees
Following a series of record-breaking heat waves in the U.S., the 2026 bee swarm season in North America began 17 days earlier than last year, forcing beekeepers to adapt to the rapidly changing season and raising new questions about how honeybees are responding to the climate crisis.
According to a new report Published by Swarmed, a monitoring network of more than 10,000 beekeepers, this year’s unusual early swarming season, focused on safe and ethical honeybee handling, follows several years of record colony declines around the world.
Bee swarming is a natural reproductive process that usually occurs in the spring in response to overcrowding and limited space within the hive. During swarming, a colony splits into two or more groups as the original queen leaves with about half of the worker bees to establish a new hive, while the remaining bees stay behind to raise a new queen.
Overcrowding of honey bees has already become a problem for wild bees. As honeybee populations are artificially increased, they often outcompete wild bees for nectar and pollen, especially in resource-limited environments. these places additional pressure on wild bee species already experienced far away. faster population decline.
Early start of this year’s herd season, biggest honey bee death In recorded U.S. history, beekeepers have reported losing more than 60% of their colonies in the past year. Such an impact hit the US agricultural sector particularly hard; as this sector relies heavily on bees for pollination of crops, which contributes roughly. The crop is worth $15 million.
Recent research has highlighted the parasitic varroa mite, which appears to be increasingly resistant to the chemicals used to control it, allowing the pest to attach to worker bees and spread viruses.
“We’ve had a very warm winter in the west this year and… that’s having an impact on the bees. They’re waking up earlier and in many parts of California, they’re starting to build their population in January, December, which leads to swarms forming much earlier than normal,” said Mateo Kaiser, general manager of Swarmed.
Kaiser noted the role the climate crisis may play in changing the reproductive cycles of bees, as well as the increasing threat posed by the varroa mite; These changes are increasingly forcing beekeepers to rethink how they manage colonies throughout the year.
Explaining how mites weaken hives, Kaiser said: “As the brood matures, the varroa mite eats away at the bee’s fatty body, thus giving birth to a weaker bee and making the colony overall weaker and more susceptible to disease.”
He noted that bees traditionally stop laying eggs during the winter months, creating a natural pause that helps suppress mite populations by limiting where they can reproduce. But warmer, shorter winters may be disrupting this cycle; some colonies now breed throughout the year and reproduce earlier than usual; These conditions can also accelerate the reproduction of varroa mites.
“If we suddenly see… [that] “If bees are laying eggs all year round as the climate is warming and therefore swarming earlier, then this could also indicate that varroa mites are breeding at unprecedented rates… It will be interesting to look at how this early season relates to this year’s winter losses,” he said.
We echo Kaiser Noah Wilson-Rich, behavioral ecologist and founder of the bee health nonprofit. Urban Bee Laboratory“From an environmental standpoint, from a bloom standpoint, what changes with climate change is the timing,” he said.
Based on data obtained by Swarmed, especially from regions where winters are warmer and rainfall is less, Wilson-Rich said that earlier springs allow flowers to bloom earlier and cause beehives to mature and reproduce earlier.
“They’re reaching their fertile point much earlier, which matches other floral pattern timings that we’ve seen and expected,” he said.
Changing environmental timelines are expected to prompt beekeepers to rethink long-standing approaches. management practicesfrom when they inspect colonies to how they prepare for swarms and changing flowering cycles. Experts say regulation is particularly critical because managed bee populations directly support broader ecosystems and agriculture.
According to Wilson-Rich, the consequences extend far beyond honey production or hive management; He points out the vital role bees play in protecting the environment.
“Since bees, as pollinators, stimulate plants to take up about half of the atmospheric carbon that humans release from our daily activities and convert it into oxygen, we can imagine an atmosphere in which bees would be further reduced and altered to have more carbon and less oxygen to breathe,” he said.
