Arizona Cattle Growers’ Ass’n v. Salazar

Issue: 1) Whether the Fish and Wildlife Service (FWS) was required to analyze and consider all of the economic impacts that result from designating a particular area as a "critical habitat" under § 4(b)(2) of the Endangered Species Act, including impacts that also may be related to the species being listed as "threatened" or "endangered"; and 2) whether it is lawful for a court to substitute its own rationale for the rationale provided by the FWS to affirm the agency's determination that a particular area, designated as a "critical habitat," is occupied by a threatened or endangered species.