By Leslie Z. Walker
The U.S. Court of Appeals for the Ninth Circuit upheld the U.S. Fish and Wildlife Service’s (“USFWS”) designation of 850,000 acres as critical habitat for fifteen endangered or threatened vernal pool species, against procedural attacks by the Homebuilders Association of Northern California (“Homebuilders”). In Homebuilders et al. v. U.S. Fish and Wildlife Service, (9th Cir. Aug. 9, 2010, No. 07-16732) ____ F.3d____ 2010 U.S. App. LEXIS 16439, Homebuilders claimed USFWS violated the Endangered Species Act (“ESA”) (16 U.S.C. § 1531 et seq.) in issuing its final rule designating the critical habitat by: 1) improperly identifying primary constituent elements on the property; 2) failing to identify the habitat as either occupied or unoccupied habitat; 3) failure to predict when the species will be conserved; 4) improper textual exclusion of development areas from critical habitat designation; and 5) failure to conduct a cumulative economic impacts analysis. Giving deference to USFWS’s determination, the appellate court, like the trial court, upheld the habitat designations, rejecting the Homebuilders arguments for the reasons described below.

