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Beaver Evidence - Historical Range of Beaver in the State of California, with an emphasis on areas within the range of coho salmon and steelhead trout

Published by Northwest Fisheries Science Center | National Oceanic and Atmospheric Administration, Department of Commerce | Metadata Last Checked: December 20, 2025 | Last Modified: 2017-01-17T00:00:00.000+00:00
This project examines historical, archaeological, and geological evidence to re-evaluate the existing management paradigm that beaver are non-native to most of California. The purpose of the study is to identify where beaver historically existed or could have existed, with particular emphasis on their likely range within watersheds that are utilized by coho salmon or steelhead trout. Identification of the habitat overlap between beaver and these two salmonids will enable restoration efforts utilizing beaver to be targeted where they will maximize the benefits for these species in terms of rearing and overwintering habitat. Location of historical locations of beaver in CA.

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