FILE - In this May 8, 2003, file photo, a Northern Spotted Owl flies after an elusive mouse jumping off the end of a stick in the Deschutes National Forest near Camp Sherman, Ore. A new study said rat poison from pot farms in California forests appears to be poisoning endangered Northern spotted owls. Scientists for the University of California at Davis and the California Academy of Sciences published the study Thursday, Jan. 11, 2018, in the journal Avian Conservation and Ecology. (AP Photo/Don Ryan, File)