In places like western Washington, the spotted owl population has been cut in half since the barred owl showed up.
在华盛顿州西部这样的地方，只要横斑猫头鹰一出现，这些地方的斑点猫头鹰的数量就会下降一半。
Originally from the eastern U.S., barred owls invaded spotted owl territory in Washington state decades ago and, Merkle says, they've moved down the coast ever since.
BillMerkle说斑猫头鹰原来栖息在美国东部地区，但他们的数十年前从东部的海岸地区向西部的华盛顿州迁徙，逐步侵入到了斑点猫头鹰的领地。
Originally from the eastern U.S., barred owls invaded spotted owl territory in Washington state decades ago and, Merkle says, they've moved down the coast ever since.
BillMerkle说斑猫头鹰原来栖息在美国东部地区，但他们的数十年前从东部的海岸地区向西部的华盛顿州迁徙，逐步侵入到了斑点猫头鹰的领地。
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