ecoregion
Noun

interactions between living and nonliving things in a large area.

Noun

organism threatened with extinction.

Endangered Species Act
Noun

(1973) U.S. legislation that protects endangered species when they are threatened by human activity.

Noun

environment where an organism lives throughout the year or for shorter periods of time.

national park
Noun

geographic area protected by the national government of a country.

threatened species
Noun

organism that may soon become endangered.

vulnerable species
Noun

level of conservation between "near threatened" and "endangered." Vulnerable is the lowest of the "threatened" categories.