Maggie Sergio shares that the US Fish and Wildlife Service plans to drop 1.3 tons of rat poison onto the Farallon Islands to kill non-native mice. The mice are attracting threatened owls who also eat endangered petrel chicks. Says Maggie, "As I read the document I couldn't believe what was being contemplated. USFWS wants to use helicopters to drop 1.3 metric tons of brodifacoum (in the form of loose rat poison pellets) over the Farallon Islands, an area that has been designated as a National Wildlife Refuge. Nonnative mice are the issue."