An Ohio wind-energy facility doesn’t want to reveal how many birds it kills, and has gone to court to keep that information secret. Blue Creek Wind Farm, owned by the Spanish company Iberdrola Renewables, has filed a lawsuit in Ohio to prevent two state agencies from making public what it calls “trade secrets.” The legal action comes after an Ohio bird conservation group, Black Swamp Bird Observatory (BSBO), asked to see bird and bat mortality data for Blue Creek. The facility went into operation in June 2012. It occupies about 80 square miles in an agricultural area of two Ohio counties rich in bird life. Blue Creek puts larger birds, including raptors, at risk. But it also creates a serious hazard for bats and many smaller bird species, including several of conservation concern. The long list of affected species includes Horned Lark, Killdeer, Golden-crowned Kinglet, Golden-winged Warbler, Black-throated Blue Warbler (pictured), Black-and-white Warbler, Philadelphia Vireo, Lapland Longspur, American Tree Sparrow, and Sora, as well as the federally endangered Indiana Bat.