Endangered Species Preservation Act of 1966
Encyclopedia
In the United States the Endangered Species Preservation Act of 1966 (Public Law 89-669) was the predecessor to the Endangered Species Act
Endangered Species Act
The Endangered Species Act of 1973 is one of the dozens of United States environmental laws passed in the 1970s. Signed into law by President Richard Nixon on December 28, 1973, it was designed to protect critically imperiled species from extinction as a "consequence of economic growth and...

.Passed by Congress, this act permitted the listing of native
Native
The term "native" can have many different social and political connotations in different contexts. In some cases it is a neutral, descriptive term, for example, when stating that one is a native of a particular city or that a certain language is one's native language...

 U.S animal species as endangered and for limited protections upon those animals.

This Act caused the Secretary of the Interior to initiate and carry out program efforts to conserve, restore, and in some cases propagate certain species of indigenous fish and wildlife he determined to be in danger of extinction. The Act also consolidated and even expanded authority for the Secretary of the Interior to manage and administer the National Wildlife Refuge System.
However, with time, researchers noticed that the animals on the endangered species list were not getting enough protection, thus further threatening their extinction.
The endangered species program was expanded by the Endangered Species Act of 1969
Endangered Species Act of 1969
The Endangered Species Act of 1969 was an expansion of the Endangered Species Preservation Act of 1966 which authorized the United States Secretary of the Interior to develop a comprehensive list of species or subspecies of animals threatened with worldwide extinction...

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