Imagine standing on a boardwalk, looking out upon a vista of pristine Florida bayfront. You see scores of roseate spoonbills foraging through the sand, sweeping their beaks from side to side while emitting low grunting croaks. Nearby are other avian waders, such as herons and white pelicans. These sights and more await you at the end of the 1.6-mile-long Snake Bight Trail in Everglades National Park. Although you may see more birds on the Anhinga Trail, you will also have to see and hear more squawking children and tourists jabbering in foreign tongues. Walk a little way down the Snake Bight Trail, which is located four miles north of the Flamingo Visitor Center, and nine-tenths of the people are left behind. They are not committed birders willing to withstand the feeding frenzy of mosquitoes on this path, which cuts through tropical hardwood and mangrove forests. You are.