Syllabus
Note: Where it is feasible, a syllabus (headnote) will be released, as is being done in connection with this case, at the time the opinion is issued. The syllabus constitutes no part of the opinion of the Court but has been prepared by the Reporter of Decisions for the convenience of the reader. See United States v. Detroit Timber & Lumber Co., 200 U. S. 321, 337.
SUPREME COURT OF THE UNITED STATES
Syllabus
WEYERHAEUSER CO. v. UNITED STATES FISH AND WILDLIFE SERVICE ET AL.
CERTIORARI TO THE UNITED STATES COURT OF APPEALS FOR THE FIFTH CIRCUIT
No. 17–71. Argued October 1, 2018–Decided November 27, 2018
The Fish and Wildlife Service administers the Endangered Species Act of 1973 on behalf of the Secretary of the Interior. In 2001, the Service listed the dusky gopher frog as an endangered species. See 16 U. S. C. §1533(a)(1). That required the Service to designate “critical habitat” for the frog. The Service proposed designating as part of that critical habitat a site in St. Tammany Parish, Louisiana, which the Service dubbed “Unit 1.” The frog had once lived in Unit 1, but the land had long been used as a commercial timber plantation, and no frogs had been spotted there for decades. The Service concluded that Unit 1 met the statutory definition of unoccupied critical habitat because its rare, high-quality breeding ponds and distance from existing frog populations made it essential for the species’ conservation. §1532(5)(A)(ii). The Service then commissioned a report on the probable economic impact of its proposed critical-habitat designation. §1533(b)(2). With regard to Unit 1, the report found that designation might bar future development of the site, depriving the owners of up to $33.9 million. The Service nonetheless concluded that the potential costs were not disproportionate to the conservation benefits and proceeded to designate Unit 1 as critical habitat for the dusky gopher frog.
Unit 1 is owned by petitioner Weyerhaeuser and a group of family landowners. The owners of Unit 1 sued, contending that the closed-canopy timber plantation on Unit 1 could not be critical habitat for the dusky gopher frog, which lives in open-canopy forests. The District Court upheld the designation. The landowners also challenged the Service’s decision not to exclude Unit 1 from the frog’s critical habitat, arguing that the Service had failed to adequately weigh the
