Cooperative Fish and Wildlife Research Units Program: Oregon
Education, Research and Technical Assistance for Managing Our Natural Resources

Oregon Project

Habitat Use and Survival of Ringtail in Southwest Oregon

September 2020 - August 2023


Participating Agencies

  • Oregon Department of Fish and Wildlife

The ringtail (Bassariscus astutus) is a small, secretive, omnivorous, nocturnal relative of the raccoon (Procyon lotor) that occurs in southwesthern Oregon, the most northern portion of the species range. Ringtail are listed as “Sensitive” and a Conservation Strategy species in Oregon with identified knowledge gaps including the need for an assessment of the species distribution and abundance, and basic information on habitat use and selection across all life stages. In collaboration with Oregon Department of Fish and Wildlife, this project focused on estimating annual and seasonal survival rates, home range size, movement patterns and vegetation characteristics of home ranges and den sites for ringtail in Oregon. These data will aid in the development of a large-scale monitoring program for ringtail in Oregon, and add to our basic understanding of ringtail ecology and demographics at the most northern edge of their distribution.

Research Publications Publication Date
Somers, LN, DH Jackson, KM Dugger, and JD Burco. 2023. A mixture of Nalbuphine, Azaperone, and Medetomidine for Immobilizing Ringtail (Bassariscus astutus). Journal of Wildlife Diseases. Journal of Wildlife Diseases 59(4):610-615. DOI: 10.7589/JWD-D-23-00006. | Download October 2023
Presentations Presentation Date
Somers, L.N., K.M. Dugger, and D.H. Jackson. 2024. Home is where the snag is: ringtail rest site use in Southwest Oregon. 2024 Annual Conference of the Oregon Chapter of The Wildlife Society. February 14-16, 2024, Hood River, OR. February 2024
Theses and Dissertations Publication Date
Somers, Lindsay N. 2023. Ringtail (Bassariscus astutus) Survival, Home Range Size, and Rest Site Use in Southwest Oregon. M.S. Thesis, Oregon State University, Corvallis, OR, 92pp. September 2023