U.S. Acts to Shrink Endangered Species Habitats

LOS ANGELES, March 19 — The Bush administration, under pressure from lawsuits by real estate developers, is urging federal judges to roll back legal protections for nearly two dozen populations of endangered species around the country.

In an effort to resolve as many as a dozen cases against them, the United States Fish and Wildlife Service and the National Marine Fisheries Service, two agencies that enforce the Endangered Species Act, are asking federal courts in California to rescind millions of acres of protected habitat for whipsnakes in the state's northern grasslands, rare birds in the scrublands to the south, fairy shrimp in shallow pools along the coast and salmon among the rivers, estuaries and shorelines of four Western states.

The administration is also questioning whether to preserve the "critical habitat" designations that safeguard millions of acres for about 10 other endangered species, from the Mexican spotted owl to the California red-legged frog, signaling a widespread shift in environmental policy that has consoled developers and incensed environmentalists.