Barred owls used the old forests that spotted owls also need
WHAT THE EVIDENCE SAYS
Researchers tracked 56 barred owls in northwestern California and found habitat selection associated with older, taller forest features also valued by northern spotted owls. Individual barred-owl territories in this study were estimated to be approximately 28 times the home-range area used by barred owls in their native eastern range. This indicates substantial spatial variation and habitat overlap, not a direct count of spotted owls displaced.
WHY IT MATTERS / OUR READ
Protecting mature forest remains important, but a forest can be structurally suitable and still fail to sustain its intended species when biological interactions change. Monitoring should link forest condition to occupancy, competition and survival, rather than equating habitat acres with recovery.
CAVEATS / UNCERTAINTY
Observational telemetry cannot by itself measure spotted-owl population effects or establish that a particular management intervention would succeed. Home-range comparisons involve different landscapes and populations; do not transfer the 28-fold ratio elsewhere.
SOURCE
USDA Forest Service indexed peer-reviewed Biological Conservation study
View original evidence ↗
Telemetry in northern California finds an invasive competitor selecting mature forest structure rather than avoiding it.
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