"1973 -" Congress passed the Endangered Species Act (ESA) on December 14, 1973. In response, 7-Eleven sold Endangered Species Cups, with 1-cent from the sale of each cup donated to the National Wildlife Federation. Donations from the program totaled $250,000, which the National Wildlife Federation used to purchase Bald Eagle habitat. The transfer of land to the U.S. Government and U.S. Fish and Wildlife Service took place on December 19, 1974 and came to be known as the Karl E. Mundt National Wildlife Refuge.