Greer Island, a small patch of land close to where the West Fork of the Trinity River flows into Lake Worth, is heavily shaded by tall oaks, cedar elms and cottonwoods. One of the quietest spots in Fort Worth, the island is home to egrets and owls, perhaps an alligator or two. And maybe, just maybe, the Lake Worth Monster. The Lake Worth Monster — aka Goat-Man — hasn’t been seen regularly at the Fort Worth Nature Center since a very memorable summer 40 years ago when all of Texas seemed to buzz with the news that a hairy, scaly...