Wildfire smoke has become an increasingly familiar sight across North America, drifting thousands of miles from its source and turning skies a sickly orange. While much of the public attention has focused on the dangers this smoke poses to human health, a growing cadre of scientists is asking a different question: what is all this smoke doing to wild animals? That question has given rise to an emerging field that researchers are calling "smoke ecology."
The field examines how wildfire smoke disrupts wild places and the creatures that inhabit them, and it seeks solutions to prevent the worst of the damage. One of the researchers at the forefront of this work is Olivia Sanderfoot, a scientist at Cornell University. She is trying to understand how the smoke billowing off wildfires is bothering birds — and, more importantly, what might be done to prevent that harm.
Sanderfoot's fieldwork takes her to a flower-freckled hillside in Amherst, in Western Massachusetts. There, she pauses to listen, and a volley of birdsong answers her. An Eastern Wood-Pewee calls. A goldfinch chimes in. A downy woodpecker makes its presence known. "It's just magical," she says, with an air of reverence. Around her, birds forage among the wildflowers while fluffy fledglings dart about, learning the ways of the world for the first time.
That vibrant soundscape is exactly what Sanderfoot fears wildfire smoke could silence or disrupt. When smoke rolls in, it does more than obscure the view; it alters the very air that birds and other wildlife depend on. The particles and chemicals in smoke can irritate sensitive respiratory systems, and the haze can change how animals move, feed, and communicate.
Birds are particularly telling subjects for this research because they are so sensitive to changes in their environment. Their songs, their foraging patterns, and their breeding behaviors are all finely tuned to specific conditions. When smoke blankets a landscape, those conditions shift quickly and unpredictably, potentially throwing off the timing of behaviors that birds rely on for survival.
The stakes are high because wildfire smoke is not a rare or localized event. In recent years, smoke from massive fires has woken up places that rarely experience such conditions, spreading haze across regions unaccustomed to its effects. That expanding reach means more species, in more habitats, are being exposed to smoke than ever before — and scientists are still trying to grasp the full scope of the consequences.
What makes smoke ecology so urgent is that it connects two fields that have traditionally operated separately: fire science and wildlife biology. Researchers are now realizing that the smoke produced by fires can be as ecologically significant as the flames themselves, affecting animals far beyond the burn zone and long after the fire has moved on.
Adding to the concern is the distinct nature of wildfire smoke as a pollutant. Previous research has found that wildfire smoke can be more harmful to humans than pollution from cars, which suggests its effects on wildlife could be similarly potent. The fine particles in smoke penetrate deep into the lungs, and the chemical composition of smoke varies depending on what is burning — vegetation, homes, or other materials.
Understanding these effects requires patient, methodical observation. Sanderfoot's approach — standing quietly on a hillside, listening — reflects a broader effort to build a baseline of knowledge about how animals behave under normal conditions so that changes during smoke events can be detected. Without knowing what a healthy soundscape sounds like, it is difficult to measure what smoke takes away.
The research also carries an applied dimension. A central goal of smoke ecology is to identify what might be done to prevent the worst mayhem. That could include land management strategies that make habitats more resilient, timing protections around sensitive breeding seasons, or reducing the frequency and intensity of the megafires that generate so much smoke in the first place.
For the public, the findings may serve as a reminder that the impacts of wildfire extend well beyond the immediate danger to people and property. When smoke drifts into a community, it is also entering the lives of the birds, insects, and mammals that share that landscape — often with consequences that are invisible to the casual observer.
The young fledglings Sanderfoot watches in Amherst are a fitting symbol of what is at risk. They are at the beginning of their lives, learning the ways of the world in an environment that is increasingly shaped by fire and smoke. How well they adapt may depend on how much scientists can learn — and how quickly that knowledge can be turned into action.
Smoke ecology is still a young discipline, and many questions remain unanswered. But the work underway in places like Western Massachusetts signals a shift in how researchers think about wildfires: not just as events that burn forests, but as events whose influence lingers in the air itself, touching every creature that breathes.
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