A rare species is a group of organisms that are very uncommon, scarce, or infrequently encountered. This designation may be applied to either a plant or...

Scarcity Rare species, a conservation category in biology designating the scarcity of an organism and implying a threat to its viability Rare or RARE may also...

'endangered', 'rare', or 'locally extinct' species is often difficult to draw given the general paucity of data on most of these species. This is notably...

Rare Species is the seventh studio album by the Finnish avant-garde metal band Waltari. "One Day" – 4:09 "Life Without Love" – 3:59 "Megacity Rain" – 4:49...

millions of years. Mass extinctions are relatively rare events; however, isolated extinctions of species and clades are quite common, and are a natural part...

the IUCN, but adds a "warning list", includes species endangered to an unknown extend, and rare species that are not endangered, but are highly at risk...

A vulnerable species is a species which has been categorized by the International Union for Conservation of Nature as being threatened with extinction...

A least-concern species is a species that has been categorized by the International Union for Conservation of Nature (IUCN) as evaluated as not being a...

Ring species thus present a difficulty for any species concept that relies on reproductive isolation. However, ring species are at best rare. Proposed...

Version 2014.2 of the IUCN Red List of Threatened Species identified 4574 Critically Endangered species, subspecies and varieties, stocks and subpopulations...