NPSpecies

In 2019, Del Norte Coast Redwoods State Park and the National Park units adjacent to it were surveyed and Humboldt martens were detected at only one of 36 survey units (Slauson 2021). This single detection occurred on the eastern edge of the park in serpentine forest habitat. In 2020, Prairie Creek Redwoods State Park and the adjacent portions of Redwood National Park were surveyed and martens were detected at 12 (31%) of 39 surveys units (Slauson 2021). In 2021, surveys were conducted in Jedediah Smith Redwoods State Park and in 2022, the final portion of Redwood National Park which included most of the Redwood Creek watershed in the southern end of the Park was surveyed. However, no martens were detected in the 2022 marten inventory. Name used in inventory project is Martes caurina humboldtensis. (Slauson 2022)

Park Species Detail: Humboldt marten, Park Species Data Source: Stillwater Sciences. 2002. Mill Creek property interim management recommendations, final draft. 2025-09-11: Martes americana humboldtensis is Threatened by the USFWS under the ESA. Martes caurina humboldtensis is listed in California in 2021: SE, SSC.