https://www.kgou.org/tags/migration migration en-US Copyright Wed, 18 Feb 2015 16:41:48 GMT https://www.kgou.org/science-technology-and-environment/2015-02-18/oklahoma-part-of-national-effort-to-bring-battered-butterfly-population-back Habitat loss and the use of herbicides to kill butterfly-preferred milkweed plants have caused the monarch butterfly population to drop by 90 percent over… Wed, 18 Feb 2015 16:41:48 GMT https://www.kgou.org/science-technology-and-environment/2015-02-18/oklahoma-part-of-national-effort-to-bring-battered-butterfly-population-back Logan Layden