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Rodenticides blamed for owl deaths, scientists say

Unpermitted marijuana farms are believed to be using anticoagulant rodenticides that end up killing northern spotted owls, whose populations are already threatened, as well as barred owls, according to a study by researchers at the University of California at Davis and the California Academy of Sciences. Other studies have connected rodenticide use on marijuana farms with fisher deaths, and scientists fear that more predators will be killed now that marijuana use has been decriminalized.

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