Northern Spotted Owl Now Functionally Extinct Across Much of the Pacific Northwest, Oregon State Study Finds

The northern spotted owl, the small forest bird that shut down logging on millions of acres of federal land in the early 1990s, has crossed a significant threshold. A new study from Oregon State University, published in the journal Ecological Applications, found that populations across large swaths of the Pacific Northwest are functionally extinct or close to it.

Damon Lesmeister, a U.S. Forest Service wildlife biologist and co-author of the study, said functional extinction "has happened" in a statement. Functional extinction means so few breeding pairs remain in some regions that the population can no longer reproduce fast enough to sustain itself or perform its role in the ecosystem.

How they measured it

Researchers with the Forest Service and Oregon State's Department of Fisheries, Wildlife, and Conservation Sciences covered roughly 38,100 square miles of federal owl habitat across Oregon, Washington and northwestern California. They split that land into 1,027 hexagon-shaped survey plots, each roughly the size of a typical owl territory, and dropped four acoustic recorders into each one.

Between February and September 2023, those 4,081 recording stations captured 2.12 million hours of forest sound. Machine-learning software sorted through the recordings for spotted owl and barred owl calls, with humans double-checking the flagged clips. The acoustic approach allowed researchers to monitor habitat at a scale that would have been impossible for field crews walking transects with binoculars.

A 36-year fight that didn't work as planned

The northern spotted owl was listed as threatened under the Endangered Species Act in 1990, and the fallout was immediate. Old-growth forest in the Pacific Northwest was some of the most valuable timber in the country, and protecting the owl meant locking much of it up. The Northwest Forest Plan followed in 1994, cutting logging on federal land and gutting timber jobs across Oregon, Washington and northern California. It became one of the defining environmental fights of the era.

More than three decades later, the bird the plan was built to save is disappearing anyway. According to the Oregon State research, continued habitat loss from logging and wildfire played a role, but the study and multiple outlets covering it, including Axios and Earth.com, point to a bigger culprit: barred owls, an invasive competitor species that has spread through the same forests and is out-hunting and out-nesting the spotted owl at every turn.

A separate peer-reviewed study in Biological Conservation, covered by the Lost Coast Outpost's EcoNews Report, used GPS trackers on 56 barred owls in Northern California and found they deliberately seek out the same older, complex forest stands that spotted owls depend on. Barred owls are slightly larger and more aggressive, and researchers say they're capable of bullying spotted owls out of nesting sites entirely.

This raises questions about the policy built around this bird. Federal regulators spent three decades restricting logging on the theory that habitat loss was the primary threat. The new data suggests the fight that actually needed winning, against an invasive competitor species, wasn't being fought at scale until far more recently. Communities in Oregon and Washington paid a real economic price for a strategy that, on its own, wasn't going to save the owl.

The removal program, and its critics

Wildlife managers have started shooting barred owls in parts of California to clear space for spotted owls, and the EcoNews Report says the removals appear to be working, freeing up habitat that had been lost to the invasion. Vitek Jirinec of the Integral Ecology Research Center, who worked on the GPS tracking study, argues sustained removal gives the spotted owl a real shot at recovery.

Critics, including some wildlife advocates, have raised concerns about a federal strategy that involves deliberately killing thousands of one owl species to protect another, arguing it treats a symptom of ecosystem imbalance rather than a root cause and that lethal control programs are expensive and open-ended by design. Forest Service researchers counter that with barred owls now saturating the landscape, habitat protection alone can no longer reverse the decline, making removal the only tool left with any track record of results.

No federal decision has been announced to expand the removal program beyond its current scope in California. The Oregon State researchers say their acoustic monitoring network, now covering both species across three states, is meant to help agencies figure out where any future removal or habitat dollars would do the most good, rather than spreading a shrinking budget across a range where, in some places, the bird may already be beyond saving.