In 2021, scientists in Guelph, Ontario set out to accomplish something that had never been done before: open a lab specifically designed for raising bumble bees in captivity. 

Now, three years later, the scientists at the Bumble Bee Conservation Lab are celebrating a huge milestone. Over the course of 2024, they successfully pulled off what was once deemed impossible and raised a generation of yellow-banded bumble bees. 

The Bumble Bee Conservation Lab, which operates under the nonprofit Wildlife Preservation Canada, is the culmination of a decade-long mission to save the bee species, which is listed as endangered under the Xerces Society for Invertebrate Conservation. 

“WPC began working with endangered bumble bees in 2013,” Lance Woolaver, executive director of Wildlife Preservation Canada, told Cottage Life. “As such, we now have more experience working with bumble bee conservation than most other organizations in Canada.” 

Although the efforts have been in motion for over a decade, the lab itself is a recent development that has rapidly accelerated conservation efforts. 

For bee scientists, the urgency was necessary. 

“We could see the major declines happening rapidly in Canada’s native bumble bees and knew we had to act, not just talk about the problem, but do something practical and immediate,” Woolaver said. 

Yellow-banded bumble bees, which live in southern Canada and across a huge swatch of the United States, were once a common species.

However, like many other bee species, their populations declined sharply in the mid-1990s from a litany of threats, including pathogens, pesticides, and dramatic habitat loss. 

Since the turn of the century, scientists have plunged in to give bees a helping hand. But it was only in the last decade that Woolaver and his team “identified a major gap” in bumble bee conservation and set out to solve it. 

“No one knew how to breed threatened species in captivity,” he explained. “This is critically important if assurance populations are needed to keep a species from going extinct and to assist with future reintroductions.”

To start their experiment, scientists hand-selected wild queen bees throughout Ontario and brought them to the temperature-controlled lab, where they were “treated like queens” and fed tiny balls of nectar and pollen. 

Then, with the help of Ontario’s African Lion Safari theme park, the queens were brought out to small, outdoor enclosures and paired with other bees with the hope that mating would occur. 

For some pairs, they had to play around with different environments to “set the mood,” swapping out spacious flight cages for cozier colony boxes. 

And it worked. 

“The two biggest success stories of 2024 were that we successfully bred our focal species, yellow-banded bumble bees, through their entire lifecycle for the first time,” Woolaver said. 

“[And] the first successful overwintering of yellow-banded bumble bees last winter allowed us to establish our first lab generation, doubling our mating successes and significantly increasing the number of young queens for overwintering to wake early spring and start their own colonies for future generations and future reintroductions.”

Although the first-of-its-kind experiment required careful planning, consideration, resources, and a decade of research, Woolaver hopes that their efforts inspire others to help bees in backyards across North America. 

“Be aware that our native bumble bees really are in serious decline,” Woolaver noted, “so when cottagers see bumble bees pollinating plants in their gardens, they really are seeing something special.”

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Header images courtesy of Tiffani Harrison and E. Richard/Wildlife Preservation Canada