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Natural Environment Study (Minimal Impacts) <br />areas in proximity to the BSA. Mammals such as coyote, raccoon, opossum, and <br />skunk have adapted to densely developed urban environments and may utilize the <br />Santa Ana River as a movement corridor; however, the lack of vegetative cover <br />within the concrete channel and high level of anthropogenic disturbance may limit <br />use. Mature ornamental trees may serve as habitat linkages for urban -tolerant bird <br />species. <br />3.1.5. Regional Species and Habitats and Natural Communities of <br />Concern <br />3.1.5.1. REGIONAL SPECIES <br />An unofficial USFWS list of threatened, endangered, and proposed species, <br />designated critical habitat, and candidate species that may occur within the vicinity of <br />the BSA was obtained in February 2018 (Appendix A). An official NOAA Fisheries <br />list was also obtained in March 2018. These lists contain three species (one plant and <br />two wildlife species) that are federally and/or State -listed as endangered or <br />threatened: Ventura marsh milk -vetch (Astragalus pycnostachyus var. lanosissimus), <br />coastal California gnatcatcher (Polioptila californica californica), and Southern <br />California steelhead trout (Oncorhynchus mykiss irideus; distinct population segment <br />[DPS]). None of these species are expected to occur within the BSA or to be affected <br />by the Project. <br />Nine non -listed special -status species have historical records within approximately 3 <br />miles (mi) of the BSA, with the majority of records being over 70 years old (CDFW <br />2018). Of the special -status species identified in the literature review, only one was <br />observed in the BSA during the field surveys (Cooper's hawk [Accipiter cooperii]). <br />Tables 2a and 2b provide respective summaries of the special -status plant and wildlife <br />species that were identified in the literature review as potentially occurring in the <br />general Project Vicinity, their habitat requirements, and rationale regarding their <br />potential to occur within the BSA. <br />3.1.5.2. HABITATS <br />USFWS and CNDDB records show no critical habitat or other special -status habitats <br />occurring within or adjacent to the BSA. There are no natural vegetation communities <br />or wetlands occurring within the BSA. <br />................................................................................................................................................ . <br />Fairview Street Improvements from 9th Street to 16th Street and Bridge Replacement Project 17 <br />