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In the West Coast marijuana-growing region known as the Emerald Triangle, scientists want to know whether rat poison spread around illegal pot plantations is killing northern spotted owls, a threatened species. But because it is so rare to find a spotted owl dead in the forest, the scientists will look at barred owls, an invasive cousin owl that's pushing spotted owls out of their territory. About half the barred owls tested so far have shown rat poison in their tissues.

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Pot grower’s poison eyed in owl death

GRANTS PASS — In the West Coast marijuana-growing region known as the Emerald Triangle, scientists want to know whether the rat poison spread around illegal pot plantations is killing northern spotted owls, a threatened species.

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