Category:Endangered species by reason they are threatened


 *  by reason(s) they are threatened — the cause(s) for flora (plant) and fauna (animal) species being endangered in their native habitats.


 * This is primarily a sub-category for by the external threat(s) stated in IUCN reports for each listed species (hyperlinked under 'References' &/or 'External links' on most wikipedia articles when species are on IUCN Red List). Please note that many species are endangered by more than one threat, and may be in several sub-categories.
 * Non−IUCN Red Listed species may also be categorized, when 'officially' on other international conservation organization &/or government agency lists. As such lists are often updated slowly, newly-discovered species and threats reliably reported in the academic literature may also be acceptable (these should be discussed and cited in the article).
 * These subcategories are used for all, from to
 * the reasons why an extinct species went extinct are of historic interest
 * the reasons why currently de-listed species were previously threatened are also of interest
 * it isn't always clear whether a species is extinct or not