The Spotted Owl's New Nemesis

Every chick counts, because spotted owls are vanishing faster than ever. Nearly 20 years after Forsman's research helped the federal government boot loggers off millions of acres to save the threatened owls, nature has thrown the birds a curveball. A bigger, meaner bird—the barred owl—now drives spotted owls from their turf. Some scientists and wildlife managers have called for arming crews with decoys, shotguns and recorded bird songs in an experimental effort to lure barred owls from the trees and kill them. To Forsman and other biologists, the bizarre turn is not a refutation of past decisions but a sign of the volatility to come for endangered species in an increasingly erratic world. As climate chaos disrupts migration patterns, wind, weather, vegetation and river flows, unexpected conflicts will arise between species, confounding efforts to halt or slow extinctions. If the spotted owl is any guide, such conflicts could come on quickly, upend the way we save rare plants and animals, and create pressure to act before the science is clear....