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