Along Upper Panama Bay, western sandpipers and semipalmated plovers dig into mudflats lined by a tangle of mangrove trees. This 93-mile-long, five-million-acre area is a stopover site for two million migrating shorebirds a year. It’s highly prized by humans, too. Just down the beach from where the shorebirds forage for invertebrates, bulldozers are breaking ground for a new development slated to rise on what was once protected land. Now conservationists are racing to safeguard the region once more. In April, after developers filed a lawsuit, Panama’s Supreme Court suspended the bay’s status as a conservation wildlife refuge, opening the door to mega-hotel and golf course construction. The court is withholding protection while it reviews the merits of the conservation designation and the developers’ suit—which charges that they weren’t consulted when the area was designated (something that isn’t required under Panamanian law). As 福利姬视频 went to print, there was no...