Portal:Extinct and endangered species

From Wikipedia, the free encyclopedia
Jump to: navigation, search

The extinct and endangered species portal

Icon

In biology and ecology, extinction is the cessation of existence of a species or group of taxa, reducing biodiversity. The moment of extinction is generally considered to be the death of the last individual of that species (although the capacity to breed and recover may have been lost before this point; see population bottleneck). Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxa, where a species presumed extinct abruptly "re-appears" (typically in the fossil record) after a period of apparent absence.

Selected article

Vaquita6 Olson NOAA.jpg
Vaquitas are the smallest and most endangered species of the cetacean order and are endemic to the northern end of the Gulf of California. The vaquita is stocky and has a classic porpoise shape. The species is distinguishable by the dark rings surrounding their eyes, patches on their lips, and a line that extends from their dorsal fins to their mouth. Their back is a dark grey that fades to a white underside. As vaquitas mature, the shades of grey lighten. Female vaquitas tend to grow to be a bit larger than the male. Females usually end up at a length of 140.6 cm (55.4 in), compared to the males 134.9 cm (53.1 in). The lifespan, pattern of growth, seasonal reproduction, and testis size of the vaquita are all similar to that of the harbour porpoise. The flippers are proportionately larger than other porpoises' and the fin is taller and more falcate. The skull is smaller and the rostrum is shorter and broader than in other members of the genus. The females are discernible from the males due to their larger size.


New articles

Madeiran Scops Owl - Bermuda Flicker - The world's 100 most threatened species - Trias Greenfinch - Tityus exstinctus - Lowland Kagu - Bermuda Towhee - Bos palaesondaicus - Battus polydamas antiquus - Tule shrew - Florida naked-tailed rat - Chadwick Beach cotton mouse - Heliaster solaris - Kaua'i Mole Duck - Yunnan lar gibbon - Darwinius - Saint Helena Shearwater - Great Ground Dove - Huahine Cuckoo-Dove - Puijila - Barbados Rail - Amitabha (bird) - Snipe-rail - Lord Howe Boobook - Lord Howe Fantail - Norfolk Boobook - Gigantornis - Australodelphis - Broad-billed Moa - North Island Giant Moa - Norfolk Thrush - Rhinodrilus fafner - Réunion Rail - Huahine Starling - Argocoffeopsis lemblinii - Chatham Kaka - Mohoidae - Waitaha Penguin - Palaeoloxodon mnaidriensis - Martinique Macaw - Galapagos damsel - Extinct Birds (Rothschild book) - Réunion Fody - Liverpool Pigeon - Bromus interruptus - Oceanic Eclectus Parrot - San Cristóbal Vermilion Flycatcher - Beelzebufo - Onychonycteris - Antioquia Brush Finch

...Archive

Categories

Subcategories of Extinction:

Did you know...

  • ...that the Vaquita is rarest cetacean in the world with an estimated 90 individuals.
  • ...that the Chihuahuan vole was the largest subspecies of the Meadow vole (Microtus pennsylvanicus) and that is possibly extinct as no lifesigns were recorded in its only known habitat in the Ojo Galeana swamp in Chihuahua, Mexico since 1998.
  • ...that 9,300 year old fossil remains of the Steppe bison (Bison priscus) were unearthed in 2011?
  • ...that the Mastodon became extinct by climate change and not by overhunting as previously thought?
  • ...that only 2500 people lived on New Zealand when the last moa species became extinct in the 15th century.
  • ...that Walton Ford, a famous wildlife artist created a painting about the extinct Elephant Bird.
  • ...that the 24-rayed Sunstar Heliaster solaris from the Galapagos waters died out during the El Niño-Southern Oscillation event in 1983/1984
  • ... that the Christmas Island Pipistrelle is possibly extinct after a survey in 2009 has failed to locate any individuals.
  • ... that the Banggai Crow was rediscovered on Peleng in 2007 after it was only known by two museum specimens from the late 19th century.
  • ... that the extinct flightless Snipe-rail had the smallest wings of all known rail species in proportion to its body size.
  • ... that only 300 copies were published of Walter Rothschild's book Extinct Birds.
  • ... that Cave Lions were about 25 percent larger than the modern African Lions and Asiatic lions.



...Archive

Selected picture


Araripe Manakin (1).jpg
The critically endangered Araripe manakin got its first reserve in 2015.


Extinct and endangered species news

  • 12 June 2014 22 out of 99 lemur species are listed as critically endangered in the 2014 IUCN Red List. 48 species are endangered and 20 species are listed as vulnerable.







...Archive

Extinct and endangered species topics

Extinction - Extinction event - Local extinction - List of extinct animals - List of extinct plants - Fossil - Holocene extinction event - Cretaceous–Paleogene extinction event - Cambrian-Ordovician extinction events - Ordovician-Silurian extinction events - Triassic-Jurassic extinction events - Late Devonian extinction - Permian-Triassic extinction event - Signor-Lipps effect - Australian megafauna - Dwarf elephant - Pseudoextinction - Extinction Vortex - Prehistoric reptile - Human overpopulation - Human extinction - Voluntary Human Extinction Movement - Evolution - Biodiversity - Invasive species - Breeding back - Lazarus taxon - Endangered species - Critically Endangered - Vulnerable species - Least Concern - Data Deficient - BirdLife International - IUCN Red List - Endangered Species Act - International Union for Conservation of Nature

Extinction events

Neoproterozoic
Palæozoic
Mesozoic
Cenozoic
-600
-550
-500
-450
-400
-350
-300
-250
-200
-150
-100
-50
0

Millions of years before present

WikiProjects

WikiProjectExtinction-Logo.png
The WikiProject for this topic is Extinction.

Other WikiProjects connected with extinction are:

See also Wikispecies, a Wikimedia project dedicated to classification of biological species.

Related portals

Field dinos 2.jpg
Kolihapeltis 01 Pengo.jpg
Issoria lathonia.jpg
Tree of life.svg
Ruwenpflanzen.jpg
Devils Punchbowl Waterfall, New Zealand.jpg
The Earth seen from Apollo 17.jpg
Dinosaurs Paleontology Biology Evolutionary biology Ecology Environment Earth sciences

Associated Wikimedia

The following Wikimedia sister projects provide more on this subject:
Wikibooks  Wikimedia Commons Wikinews  Wikiquote  Wikisource  Wikiversity  Wikivoyage  Wiktionary  Wikidata 
Books Media News Quotations Texts Learning resources Travel guides Definitions Database

Purge server cache