# Endangered and Threatened Wildlife and Plants; Designation of Revised Critical Habitat for the Northern Spotted Owl
> **US Fish and Wildlife Service** · Final rule. · Published 2012-12-04 · Effective 2013-01-03 · 77 FR 71876
## Document
- **Document number:** 2012-28714
- **Category:** endangered-species
- **Sub-agency:** US Fish and Wildlife Service
- **Federal Register citation:** 77 FR 71876
- **CFR reference:** 50 CFR 17
- **Publication date:** 2012-12-04
- **Effective date:** 2013-01-03
- **Interior docket:** FWS-R1-ES-2011-0112
## Abstract

We, the U.S. Fish and Wildlife Service, designate revised critical habitat for the northern spotted owl (Strix occidentalis caurina) under the Endangered Species Act. In total, approximately 9,577,969 acres (ac) (3,876,064 hectares (ha)) in 11 units and 60 subunits in California, Oregon, and Washington fall within the boundaries of the critical habitat designation.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2012/12/04/2012-28714/endangered-and-threatened-wildlife-and-plants-designation-of-revised-critical-habitat-for-the)
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