U.S. Authorities for Nature Resources: U.S Fish and Wildlife Service and National Park Service belong to the U.S. Department of Interior
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U.S. Fish and Wildlife Service: the federal government agency dedicated to the conservation of fish, wildlife, plants, and their habitats
The National Park Service is a bureau of the Department of the Interior. Directly overseeing its operation is the Department's Assistant Secretary for Fish, Wildlife and Parks.
How many areas are in the National Park System?
The system includes 408 areas covering more than 84 million acres in every state, the District of Columbia, American Samoa, Guam, Puerto Rico, and the Virgin Islands. These areas include national parks, monuments, battlefields, military parks, historical parks, historic sites, lakeshores, seashores, recreation areas, scenic rivers and trails, and the White House.