WASHINGTON — Congress has approved two measures to undo federal protections for the lesser prairie chicken and northern long-eared bat — two endangered animals that have seen their populations plummet over the years. In separate votes Thursday, the House gave final legislative approval to rescind protections for the lesser prairie chicken — a rare prairie bird once thought to number in the millions, but now hovers around 30,000, officials said — and the long-eared bat, one of 12 bat types decimated by a fungal disease called white-nose syndrome. The legislative actions, backed mostly by Republicans, represent rare congressional involvement in matters usually left to the U.S.