U.S. Fish & Wildlife Service

Sacramento Fish & Wildlife OfficeServing the people, conserving the fish, wildlife, and plants of California

A Unit Of The Pacific Southwest Region

Bay Checkerspot Butterfly

2007 Proposed Critical Habitat Revision

Photo: John Cleckler, USFWS

Unit Maps are in PDF Files smaller than 500 KB.

Overview Map

San Mateo County

Santa Clara County

Currently Designated Critical Habitat Units

For reference, the following maps show the current critical habitat units, which were designated in 2001.

Last updated: November 13, 2017