In a decision difficult to understand without context the Supreme Court held that “critical habitat” under the Endangered Species Act (ESA) must also be habitat. In Weyerhaeuser Co. v. United State Fish and Wildlife Service the Court also held a federal court may review an agency decision not to exclude an area from critical habitat because of the economic impact. The State and Local Legal Center (SLLC) filed an amicus brief on the latter issue arguing in favor of the result the Court reached.
The United State Fish and Wildlife Service (Service) listed the dusky gopher frog as an endangered species. It designated as its “critical habitat” a site called Unit 1 in Louisiana owned or leased by Weyerhaeuser Company, a timber company. The frog hasn’t been seen at this location since 1965. As of today Unit 1 has all of the features the frog needs to survive except “open-canopy forests,” which the Services claims can be restored with “reasonable effort.”
Weyerhaeuser argued Unit 1 could not be a “critical habitat” for the frog because it could not survive without an open-canopy forests. The Fifth Circuit disagreed holding that the definition of critical habitat contains no “habitability requirement.”
The Supreme Court held unanimously that “critical habitat” must be habitat. The ESA states that when the Secretary lists a species as endangered he or she must also “designate any habitat of such species which is then considered to be critical habitat.”