Breathing Underwater: How Queen Bees Survive Winter With a Hidden Superpower

New research reveals an astonishing survival strategy that could reshape how we understand insects in a changing climate.

Every winter, as temperatures drop and landscapes freeze over, most insects vanish from sight. But beneath the soil, a quiet drama unfolds—one that scientists are only just beginning to understand.

New research has uncovered a remarkable ability in bumblebee queens: they can survive completely underwater for days, enduring flooded burrows caused by melting snow and heavy rain. Far from being fragile, these insects possess a hidden resilience that may be crucial in a world of increasingly extreme weather.

Buried, Flooded… and Still Alive

Unlike worker bees, which die before winter, queen bumblebees are the sole survivors of their colonies. After mating, they dig shallow burrows in the soil and enter a dormant state known as diapause—a kind of insect hibernation that can last six to nine months.

But this underground refuge is far from safe.

As winter turns to spring, melting snow and rainfall can flood these burrows, trapping queens underwater. Until recently, scientists assumed such conditions would be fatal.

They were wrong.

The breakthrough came almost by accident. During a laboratory experiment, researchers noticed that several queen bees had been accidentally submerged due to condensation flooding their containers.

They expected the worst.

Instead, the bees were alive.

Follow-up experiments confirmed the astonishing result: queen bumblebees can survive submerged for up to a week—and possibly longer.

Breathing Without Air

So how do they do it?

Researchers found that even underwater, the queens continue to produce small amounts of carbon dioxide—evidence that they are still respiring. Their metabolism slows dramatically during diapause, reducing their oxygen needs to a minimum.

In addition, the bees switch to a backup system: anaerobic metabolism, a process that generates energy without oxygen. This leads to a buildup of lactate (similar to what happens in human muscles during intense exercise).

When the bees finally emerge from the water, their bodies go into overdrive for several days, clearing this buildup and restoring normal function.

This dual survival strategy—slowed breathing plus emergency energy production—makes queen bees surprisingly resilient.

Scientists now believe this ability is not a rare anomaly but an adaptation to flood-prone environments. In nature, shallow burrows are frequently exposed to waterlogging, especially during unpredictable seasonal transitions.

What once seemed like a deadly hazard may actually be a condition these insects are evolved to endure.

Why This Matters More Than Ever

This discovery goes beyond curiosity—it has important implications in the context of climate change.

As weather patterns shift, spring flooding is becoming more frequent and intense in many regions. Understanding which species can survive these extremes—and how—helps scientists predict ecological resilience.

Bumblebees are vital pollinators, supporting both wild ecosystems and agriculture. The survival of queen bees directly determines whether new colonies can form each year.

Their unexpected ability to endure underwater conditions may offer a rare piece of good news in an otherwise worrying environmental picture.

Rethinking Insect Survival

For decades, insects have often been viewed as highly vulnerable to environmental stress. But discoveries like this challenge that assumption.

Instead, they reveal a more complex reality:
some species possess hidden physiological tools that allow them to survive conditions we would never expect.

The humble queen bumblebee, buried in the cold and dark, is not just waiting for spring.

She is enduring floods, slowing her body to the brink—and quietly proving that survival in nature is often far more extraordinary than we imagine.