A species (pl.: species) is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can...

Speciesism (/ˈspiːʃiːˌzɪzəm, -siːˌzɪz-/) is a term used in philosophy regarding the treatment of individuals of different species. The term has several...

An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction...

An invasive species is an introduced species to an environment that becomes overpopulated and harms its new environment. Invasive species adversely affect...

introduced species, alien species, exotic species, adventive species, immigrant species, foreign species, non-indigenous species, or non-native species is a...

On the Origin of Species (or, more completely, On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle...

Species is a 1995 American science fiction horror film directed by Roger Donaldson and written by Dennis Feldman. It stars Ben Kingsley, Michael Madsen...

the IUCN Red List of Threatened Species identified 5220 (2754 animals, 1 fungus, 2464 plant, 1 protist) endangered species, subspecies and varieties, stocks...

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...

In zoological nomenclature, a type species (species typica) is the species name with which the name of a genus or subgenus is considered to be permanently...

A keystone species is a species that has a disproportionately large effect on its natural environment relative to its abundance, a concept introduced in...

Species richness is the number of different species represented in an ecological community, landscape or region. Species richness is simply a count of...

precise meanings are cryptic species for two or more species hidden under one species name, sibling species for two (or more) species that are each other's closest...

last member if it loses the capacity to reproduce and recover. Because a species' potential range may be very large, determining this moment is difficult...

Foundation. Its aim is to create a comprehensive open content catalogue of all species; the project is directed at scientists, rather than at the general public...

Rats are various medium-sized, long-tailed rodents. Species of rats are found throughout the order Rodentia, but stereotypical rats are found in the genus...

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

system"), also called binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, both of which...

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

number of lists of fictional species: List of fictional extraterrestrials (by media type) Lists of fictional alien species: A, B, C, D, E, F, G, H, I,...

In biogeography, a native species is indigenous to a given region or ecosystem if its presence in that region is the result of only local natural evolution...

Species: The Awakening is a 2007 science fiction action thriller television film and the fourth and final installment of the Species film series. The film...

A species description is a formal scientific description of a newly encountered species, usually in the form of a scientific paper. Its purpose is to...

An IUCN Red List Critically Endangered (CR or sometimes CE) species is one that has been categorized by the International Union for Conservation of Nature...

modern humans are the most common and widespread species of primate, and the last surviving species of the genus Homo. They are great apes characterized...

Several species have been assumed to exist, but due to a lack of physical evidence they can only be regarded as potential species. Hypothetical species are...

Dominant species may mean: Dominant species (ecology), one of a small number of species which dominate in an ecological community Dominant Species (novel)...

A species concept is a framework for differentiating different species. There are at least 26 recognized species concepts, and difficulty in reconciling...

The Endangered Species Act of 1973 (ESA or "The Act"; 16 U.S.C. § 1531 et seq.) is the primary law in the United States for protecting and conserving...

extinction event. Bamboo species can be divided into two groups: sympodial (clumping) and monopodial (running) species. Sympodial species grow from the soil...