Science Friday

A Startling Plan To Save Spotted Owls—From Barred Owls

December 3, 2025

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  • The proposed U.S. Fish and Wildlife Service strategy to save the spotted owl involves controlling the invasive barred owl population, potentially by removing up to 150,000 barred owls over 30 years, which expert Dr. Rocky Gutierrez considers the only viable alternative. 
  • The barred owl's impact extends beyond the spotted owl, affecting at least 29 other threatened, endangered, or species of conservation concern, including various frogs, salamanders, and smaller owls. 
  • The controversial plan to cull barred owls is supported by many conservationists and loggers, but opposed by some lawmakers and animal welfare groups, despite the scientific consensus that habitat protection alone is insufficient to save the spotted owl. 

Segments

Introduction and Plan Overview
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(00:01:57)
  • Key Takeaway: The U.S. Fish and Wildlife Service proposed killing up to 450,000 barred owls over 30 years to save the spotted owl.
  • Summary: Host Flora Lichtman introduces the episode of Science Friday focusing on the startling proposal to save the spotted owl from the competing barred owl. The strategy involves eliminating hundreds of thousands of barred owls across 24 million acres. This plan is controversial, pitting loggers and some conservationists against lawmakers and animal welfare groups.
Expert Endorsement of Culling
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(00:03:22)
  • Key Takeaway: Dr. Rocky Gutierrez asserts that controlling barred owls is the only option ensuring the spotted owl’s persistence.
  • Summary: Owl ecologist Dr. Rocky Gutierrez confirms that the barred owl management strategy is the only viable alternative for spotted owl survival. He notes that the barred owl’s invasion impacts numerous other species, citing a recent paper showing 29 species are affected. Barred owls, non-native to the West, flourish due to a lack of competition and adapted prey.
Clarifying Culling Numbers
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(00:05:33)
  • Key Takeaway: The 450,000 figure represents a worst-case cap, with the preferred strategy aiming for approximately 150,000 removals over 30 years.
  • Summary: Dr. Gutierrez acknowledges the strong emotional reaction to killing owls but clarifies that the 450,000 number is the maximum alternative, not the target. The preferred strategy aims for about 5,000 removals annually, totaling around 150,000 over three decades. The goal is to control barred owl density in specific areas, like Marin County, rather than causing their complete extinction.
Viability of Alternatives
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(00:09:40)
  • Key Takeaway: Protecting old-growth forest habitat alone will not prevent barred owl invasion, making targeted removal necessary.
  • Summary: The expert dismisses the idea that simply conserving forests will save the spotted owl because barred owls utilize all habitats used by spotted owls, plus others. This conclusion is based on four decades of extensive data gathered on spotted owl requirements. Scientists perceive no other viable alternative to this management plan.
Historical Context of Wildlife Management
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(00:11:20)
  • Key Takeaway: Manipulating environments to control wildlife populations, such as deer or cowbirds, is a common practice, making the owl culling method not unprecedented.
  • Summary: The act of culling wild animals is not new, as humans have historically manipulated their environments, citing examples like controlling deer or brown-headed cowbirds impacting other endangered species. The strong emotional response to this specific plan stems from the cultural significance and charisma of owls. Humans have long controlled species impacting fisheries or other conservation targets.
Why Owls Fascinate Humans
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(00:16:33)
  • Key Takeaway: Owls, particularly the spotted owl, attract human interest because they possess abilities like nocturnal vision that humans lack, giving them a mysterious quality.
  • Summary: Owls have interested humans for at least 40,000 years, partly because they can see in very limited light conditions at night. Their mostly nocturnal lifestyle contributes to a mysterious aura that elicits strong emotive responses. Dr. Gutierrez shared that he wears an owl sweater knitted by his wife, currently featuring a Long-whiskered Owlet.