This stamp was issued on December 5, 1947, in Florida City, the day before the official dedication of Everglades National Park by President Harry S. Truman. The design, by artist Robert W. Hines, features a Great White Heron, a prominent resident of the park, superimposed on an outline map of Florida, with the park's boundaries clearly marked. The issuance of this stamp was the culmination of decades of advocacy to protect the fragile Everglades ecosystem from development and drainage projects. It served as a powerful symbol of the growing conservation movement in the United States and highlighted the national significance of this vast wetland, which is crucial to the environmental health of South Florida, including the Miami metropolitan area. The stamp's vibrant green color evokes the lushness of the Everglades landscape.