critically endangered
Noun

level of conservation between "endangered" and "extinct in the wild."

Noun

organism threatened with extinction.

resource
Noun

available supply of materials, goods, or services. Resources can be natural or human.

subspecies
Noun

(subsp.) group of organisms within a single species, often distinguished by geographic isolation.

vulnerable species
Noun

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