A condition in which a species or subspecies, although not currently threatened with extinction, exists in such small numbers throughout its range that it may be endangered if the quality of its environment worsens.
A species that can only be found in a few places, for example, off-shore islands. They are very vulnerable but are not quite endangered, as long as their habitats (homes) are safe and they are reproducing (breeding) without help from people.
A rare species is an organism which is very uncommon or scarce. This designation may be applied to either a plant or animal taxon, and may be distinct from the term "endangered" or "threatened species". Designation of a rare species may be made by an official body such as a national government, state or province.