Read this introduction to the Endangered Species Act (ESA).
When Congress passed the Endangered Species Act (ESA) in 1973, it recognized that our rich natural heritage is of "esthetic, ecological, educational, recreational, and scientific value to our Nation and its people". It further expressed concern that many of our nation's native plants and animals were in danger of becoming extinct.
The purpose of the ESA is to protect and recover imperiled species and the ecosystems upon which they depend. It is administered by the U.S. Fish and Wildlife Service and the Commerce Department's National Marine Fisheries Service (NMFS). The FWS has primary responsibility for terrestrial and freshwater organisms, while the responsibilities of NMFS are mainly marine wildlife such as whales and anadromous fish such as salmon.
Under the ESA, species may be listed as either endangered or threatened. "Endangered" means a species is in danger of extinction throughout all or a significant portion of its range. "Threatened" means a species is likely to become endangered within the foreseeable future. All species of plants and animals, except pest insects, are eligible for listing as endangered or threatened. For the purposes of the ESA, Congress defined species to include subspecies, varieties, and, for vertebrates, distinct population segments.
In 1972, President Nixon declared that conservation efforts in the United States aimed toward preventing the extinction of species were inadequate and called on the 93rd Congress to develop comprehensive endangered species legislation. Congress responded, and on December 28th, the Endangered Species Act (ESA) of 1973 was signed into law.
Congress passed the Endangered Species Preservation Act in 1966, providing a means for listing native animal species as endangered and giving them limited protection. The Departments of Interior, Agriculture, and Defense were to seek to protect listed species, and, insofar as consistent with their primary purposes, preserve the habitats of such species. The Act also authorized the Service to acquire land as habitat for endangered species. In 1969, Congress amended the Act to provide additional protection to species in danger of "worldwide extinction" by prohibiting their importation and subsequent sale in the United States. This Act called for an international meeting to adopt a convention to conserve endangered species. One amendment to the Act changed its title to the Endangered Species Conservation Act.
A 1973 conference in Washington, D. C. led 80 nations to sign the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES), which monitors, and in some cases, restricts international commerce in plant and animal species believed to be harmed by trade.
Later that year, Congress passed the Endangered Species Act of 1973. It
Congress enacted significant amendments in 1978, 1982, and 1988, while keeping the overall framework of the 1973 Act essentially unchanged. The funding levels in the present Act were authorized through Fiscal Year 1992. Congress has annually appropriated funds since that time.