Queen Bees Survive Week Underwater During Winter Hibernation

Queen bumblebees have a superpower scientists never knew existed: they can breathe underwater for up to a week while hibernating through winter.

Researcher Sabrina Rondeau stumbled onto this discovery by accident during a pesticide study. She found four queen bees completely submerged in water-filled tubes in her lab refrigerator, fully expecting them to be dead. To her amazement, all four were alive and well.

That surprising moment launched a full scientific investigation into how these insects pull off such an unlikely feat. The findings, published in Proceedings of the Royal Society B: Biological Sciences, reveal a survival strategy that could mean the difference between life and death for entire bee colonies.

During their six to nine month winter sleep called diapause, queen bees bury themselves in shallow underground burrows. When snow melts and rain falls, these burrows often flood completely. Unlike other bees in the colony, queens have evolved to handle this watery challenge.

The research team recreated winter conditions by placing healthy queens in a cold, dark refrigerator until they entered diapause. They then submerged the sleeping bees in flooded chambers, with some staying underwater for just hours and others for eight full days.

Throughout the experiment, the queens continued producing carbon dioxide at low but steady rates, proving they were still breathing. Their metabolic rate stayed consistent whether submerged for hours or days.

The bees also relied on a backup energy system that works without oxygen, though this caused lactate to build up in their bodies. Once removed from the water, their metabolic rate spiked dramatically for two to three days as they cleared out the accumulated lactate and recovered.

Why This Inspires

This discovery shows nature's incredible adaptability in the face of harsh conditions. Queen bees carry the future of their entire colony through winter, and this underwater breathing ability ensures they can fulfill that vital role even when conditions turn against them.

The timing matters more than ever as climate change brings unpredictable spring flooding patterns. What seemed like a curious quirk of nature turns out to be a critical survival tool that helps bumblebees persist in an increasingly unstable world.

The research team believes this resilience offers hope for understanding how other ground-dwelling insects might adapt to flood-prone habitats as weather patterns shift.