Polar bears are a vulnerable species, with a loss of sea ice a leading reason for their population decline.
Photograph by Linda Drake, MyShot
region at Earth's extreme north, encompassed by the Arctic Circle.
to reduce or go down in number.
(1973) U.S. legislation that protects endangered species when they are threatened by human activity.
conditions that surround and influence an organism or community.
environment where an organism lives throughout the year or for shorter periods of time.
to pursue and kill an animal, usually for food.
to reproduce or breed.
to create offspring, by sexual or asexual means.
organism that may soon become endangered.
level of conservation between "near threatened" and "endangered." Vulnerable is the lowest of the "threatened" categories.