According to the FWS's latest draft recovery plan for the spotted owl: "Limited experimental evidence, correlational studies and copious anecdotal information all strongly suggest barred owls compete with spotted owls for nesting sites, roosting sites and food—and possibly predate spotted owls. The threat posed by barred owls to spotted owl recovery is better understood now than when the spotted owl was listed. Because the abundance of barred owls continues to increase, the effectiveness in addressing this threat depends on action as soon as possible."
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