Complex sentence: The California spotted owl is not considered to be threatened nor endangered by the USFWS; however, it considered to be a species of special concern by the state of California and the United States Forest Service (USFS).
Split into simpler sentences: The California Spotted Owl is not considered to be threatened nor endangered by the USFWS. However, it is a species of special concern by the state of California and the United States Forest Service (USFS).