As devastating wildfires become more frequent and intense across the globe, a new scientific discipline is emerging to answer a question that has largely gone unexplored: what happens to wild animals when the air they breathe fills with smoke? Researchers are now pioneering the field of "smoke ecology," an area of study dedicated to understanding how wildfire smoke disrupts natural habitats and the creatures that depend on them — and what might be done to prevent the worst of that harm.
At the forefront of this effort is Olivia Sanderfoot, a researcher at Cornell University who is working to unravel the specific ways that smoke from wildfires affects birds. Her work represents one of the first systematic attempts to document how avian species respond when their environments are blanketed in haze and particulate matter. The stakes are high, as wildfire seasons grow longer and more destructive, pushing smoke into regions that rarely experienced such conditions in the past.
On a recent morning, Sanderfoot stood on a hillside in Amherst, in Western Massachusetts, surrounded by wildflowers buzzing with activity. She paused to listen as a cascade of birdsong filled the air — an Eastern Wood-Pewee, a goldfinch, a downy woodpecker — a moment she described with visible reverence as "just magical." Around her, birds foraged among the blooms while fluffy fledglings darted about, learning the ways of the world.
Scenes like this one are precisely what Sanderfoot hopes to protect. Her research focuses on how the smoke billowing off wildfires bothers birds and what can be done to prevent that harm. The questions she and other scientists are asking range from the immediate — how do birds behave when smoke rolls in? — to the broader ecological consequences that may unfold over years and even decades.
The urgency of this work stems from a troubling trend. Wildfire smoke has increasingly woken up places unaccustomed to its effects, drifting far beyond the immediate burn zones and settling over cities, towns, and rural landscapes that previously enjoyed clear skies. This expanding reach means that animals in regions with no evolutionary history of exposure to wildfire smoke are now facing it, often with unknown consequences.
Past research has already shown that wildfire smoke is more harmful to humans than pollution from cars, a finding that raises serious concerns about what the same particles might do to wildlife. The fine particulate matter in smoke can penetrate deep into the lungs and enter the bloodstream, triggering inflammation and a host of health problems. For birds, whose respiratory systems are highly efficient and sensitive, the risks may be equally severe.
Birds are particularly vulnerable because their survival depends on finely tuned behaviors — foraging, mating, migrating, and evading predators — all of which can be disrupted when smoke obscures their vision, irritates their lungs, or alters the availability of food. A smoke-filled sky can also change temperature and light levels, confusing the cues that birds rely on to navigate and time their activities.
Scientists like Sanderfoot are trying to determine whether smoke exposure leads birds to change their songs, reduce their activity, or abandon their territories altogether. Each of these behavioral shifts could have cascading effects on reproduction and survival, potentially contributing to population declines in species already under pressure from habitat loss, climate change, and disease.
The field of smoke ecology extends beyond birds. Wildfire smoke perturbs wild places in myriad ways, affecting everything from insects and amphibians to large mammals. Understanding these impacts requires researchers to combine tools from atmospheric science, toxicology, ecology, and behavioral biology — an interdisciplinary approach that is still in its infancy but rapidly gaining momentum.
One of the central challenges is that smoke events are unpredictable and short-lived, making it difficult to design controlled studies. Researchers must race to collect data when fires break out, often working in hazardous conditions and with limited resources. Despite these obstacles, the growing frequency of smoke events is creating more opportunities to observe and measure their effects.
The implications of this research extend to conservation and land management. If scientists can identify which species are most vulnerable to smoke, and under what conditions, they may be able to recommend measures to protect them — such as providing clean-air refuges, adjusting the timing of prescribed burns, or managing habitats to reduce stress on wildlife during smoke episodes.
There is also a broader public health dimension. The same smoke that harms birds also harms people, and the lessons learned from studying wildlife may inform efforts to protect human communities. Understanding how smoke moves through ecosystems and affects living organisms can help policymakers and planners prepare for a future in which smoke events are more common and more severe.
For now, Sanderfoot's work remains grounded in the simple act of listening — paying attention to the birds around her and asking how their lives are changing. On that flower-freckled hillside in Amherst, the chorus of songbirds serves as both a reminder of what is at stake and a call to action. As wildfires continue to reshape the planet, the emerging field of smoke ecology offers a vital window into the hidden costs of a warming world.
The research is still early, and many questions remain unanswered. But the scientists pursuing them are driven by a conviction that understanding these impacts is the first step toward preventing them. In the years ahead, their findings could shape how we manage landscapes, protect wildlife, and safeguard the air that all living creatures share.
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