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The world's 46 most endangered species

  • The world's 46 most endangered species
    1/ Dan Olsen // Shutterstock

    The world's 46 most endangered species

    Humans are good at a lot of things, but perhaps our greatest skill is making other species go extinct. According to many scientists, our planet has already begun its sixth mass-extinction cycle. Species across the globe are dying off at an alarming rate.

    Over the past century, animals have gone extinct 100 times faster than the normal "background" rate. That means that the rate of extinction that should have taken 800-10,000 years occurred in just 100 years. It’s objectively terrifying to think about which species will be the next to go.

    The International Union for Conservation of Nature keeps track of how endangered a species is with its authoritative Red List of Threatened Species. They cite factors like residential and commercial development, climate change, and energy production as reasons why species become endangered, and they track the species’ populations from year to year. From 2016 to 2017, every major category of life except birds saw the number of “critically endangered” species rise (and birds only fell by 1.3%). For this list, we consulted the Red List to find species deemed “critically endangered” across four major biological kingdoms: animalia, plantae, fungi, and chromista.

    Read on to learn about these fascinating species that may not be long for this world—and what, if anything, can be done to protect them.

  • Species: Vaquita (Phocoena sinus)
    2/ jheuser // iNaturalist

    Species: Vaquita (Phocoena sinus)

    Called “the most endangered marine mammal,” the vaquita has seen a dramatic drop in population numbers from more than 500 in 1997 to under 20 in 2017. The five-foot-long porpoises live in the Gulf of Mexico and were only discovered in 1958. They’ve been brought to the brink of extinction primarily by illegal fishing. Fishing nets often accidentally trap and kill vaquitas, which share the waters with other fish deemed valuable by the Chinese market. The International Committee for the Recovery of the Vaquita was established in 1997 to study and protect this small porpoise.

  • Species: Starry Breck Lichen (Buellia asterella)
    3/ The Norwegian Biodiversity Information Centre (NBIC) // GBIF

    Species: Starry Breck Lichen (Buellia asterella)

    Mostly found in western European dry grasslands at low elevation, this variety of lichen (a cross between fungi and algae) is now only found in three or four locations around the globe. The number one cause of its vulnerability is habitat change and destruction, which accounts for its low numbers in Germany, Norway, and the United Kingdom.

  • Species: Great Orme Berry (Cotoneaster cambricus)
    4/ Royal Botanic Garden Edinburgh // GBIF

    Species: Great Orme Berry (Cotoneaster cambricus)

    First recorded as abundant in 1783, there are now only 17 wild plants of this rose relative left in Wales, thanks to plant collectors and grazing by animals like rabbits, sheet, and feral goats. In Welsh, it’s called “Creigafal y Gogarth,” which translates to “rock apple of Gogarth.” If the Great Orme berry disappears, humans will never again know the taste of its yellow pear-shaped berries that turn reddish-orange when fully ripe.

  • Species: Galapagos Stringweed (Bifurcaria galapagensis)
    5/ MNHN - Museum national d'Histoire naturelle // GBIF

    Species: Galapagos Stringweed (Bifurcaria galapagensis)

    Before 1983, Galápagos stringweed was a type of algae readily found in the Galápagos Islands and beyond. Since then, it has virtually disappeared. The major culprit seems to be El Niño and associated climate change. The IUCN will reassess the alga in the next five or ten years; if no further specimens are discovered, they plan to label it completely extinct.

  • Species: Black Clubshell (Pleurobema curtum)
    6/ Elizabeth Hinkle //

    Species: Black Clubshell (Pleurobema curtum)

    In the river waters of Alabama and Mississippi, this mussel is holding on for dear life—unless, of course, it’s already gone. Listed as “possibly extinct,” there hasn’t been a live specimen discovered in at least a decade. Dredging and sediment shifting as a result of the construction of the Tennessee-Tombigbee Waterway appears to be the most logical factor in the disappearance of the black clubshell.

    *Image of Pleurobema riddellii

  • Species: Rove Beetle (Atheta caprariensis)
    7/ John Tann // Wikicommons

    Species: Rove Beetle (Atheta caprariensis)

    The rove beetle’s habitat barely takes up a five square-mile forest patch of the small Azore island chain off the coast of Portugal. They live underneath tree bark and in the soil, and as nocturnal predators, they hunt for sustenance at night. As changes in the Azores economy dictate changes in the way land is used, the rove beetle’s habitat continues to be threatened.

  • Species: Boreal Felt Lichen (Erioderma pedicellatum)
    8/ Frank Fogarty //

    Species: Boreal Felt Lichen (Erioderma pedicellatum)

    This lichen lives on both sides of the Atlantic, with its main habitat in Newfoundland and other parts of eastern Canada. The boreal felt lichen has become endangered due to a rise in logging and air pollution; recent estimates claim that its population will decrease by 49% over the next 25 years.

  • Species: Tropical Acidweed (Desmarestia tropica)
    9/ MNHN - Museum national d'Histoire naturelle // GBIF

    Species: Tropical Acidweed (Desmarestia tropica)

    El Niño is to be blame for the decimation of this Galápagos alga. Found in only two locations and not seen since 1972, there’s a high likelihood that tropical acidweed is extinct. The cold water species is not at all amenable to rising sea temperatures.

  • Species: Devils Hole Pupfish (Cyprinodon diabolis)
    10/ Olin Feuerbacher // Wikicommons

    Species: Devils Hole Pupfish (Cyprinodon diabolis)

    One of the rarest fish in the world, the Devils Hole pupfish can only be found in a single limestone pool in one of the hottest places in America: Devils Hole, a 93°F offshoot of the Death Valley National Park in Nevada. The pupfish is just an inch long, and while their habitat is fenced in for protection, their pool is still subject to human interference—which is said to be the main cause for their population decrease.

  • Species: Fitzroy Falls Crayfish (Euastacus dharawalus)
    11/ David Haintz //

    Species: Fitzroy Falls Crayfish (Euastacus dharawalus)

    This freshwater crayfish is indigenous to the state of New South Wales in Australia, specifically Fitzroy Falls in the Wildes Meadows Creek. There are upwards of 600 mature crayfish of the species, but the introduction of fish like rainbow trout and carp into the area for recreational purposes represents a major problem for the crustaceans, who have to contend with new predators.

    *Image of Euastacus bispinosus Clark

  • Species: Javan Rhinoceros (Rhinoceros sondaicus)
    12/ Museum of Comparative Zoology, Harvard University // GBIF

    Species: Javan Rhinoceros (Rhinoceros sondaicus)

    The Javan rhinoceros hails from Vietnam and Indonesia; today there are fewer than 70 left in the world. A group of 40-60 currently live on the western tip of the island of Java. Demand for rhino horn, mainly in China, is the most prominent reason why this species is in severe decline. Conservation groups like the Javan Rhino Conservation Program are actively working to protect this rhinoceros but time is running out.

    *Image of Rhinoceros sondaicus Desmarest

  • Species: Little Chamal (Zamia vazquezii)
    13/ The New York Botanical Garden // GBIF

    Species: Little Chamal (Zamia vazquezii)

    Little chamal is a plant from the Mexican state of Veracruz. Known as “amigo de maiz” (“friend of corn” in Spanish), habitat loss has taken it from endangered in 1998 to critically endangered in 2003. With deforestation still rising in Veracruz, the remaining cycads (fewer than 50) are struggling to survive.


  • Species: Desroches Cockroach (Delosia ornata)
    14/ National Museum of Natural History, Smithsonian Institution // GBIF

    Species: Desroches Cockroach (Delosia ornata)

    Cockroaches have long been credited with the ability to survive just about anything, but the Desroches cockroach in the Seychelles has met an enemy it may not be able to surmount: the hotel industry. As it only inhabits a little over a half of a square mile, the opening of a hotel property on their native habitat could spell the end of the Desroches, which was down to less than 1,000 total individuals back in 2006.

    *Image of Malocampa delosia Schaus

  • Species: Golf Ball (Mammillaria herrerae)
    15/ donaji03 //

    Species: Golf Ball (Mammillaria herrerae)

    This Mexican cactus bears a striking resemblance to a golf ball, which explains the name. In fact, its flowers are so appealing to cactus lovers that illegal collection is the main reason why it’s listed as critically endangered. Over the past 20 years, 95% of the species has been removed or destroyed even though it’s legally protected by the Mexican government. Conservation efforts are underway by the Cadereyta Regional Botanical Garden to encourage reproduction of the cactus.

    *Image of Mammillaria herrerae Werderm

  • Species: Bridgeoporus nobilissimus
    16/ tomvolk //

    Species: Bridgeoporus nobilissimus

    The fungus Bridgeoporus nobilissimus can only be found on extremely old, large Abies trees and tree stumps in Oregon, Washington, and northern California. As the population Abies trees dwindles due to logging and forest fires, the number of trees large enough to actually support Bridgeoporus nobilissimus has dropped significantly. Only 9% of the tree population still exists, which has whittled the fungus population down to 140 mature individuals.


  • Species: Geometer Moth (Eupithecia ogilviata)
    17/ Emily Hjalmarson //

    Species: Geometer Moth (Eupithecia ogilviata)

    In May 1903, the first and only Geometer moth of this species was discovered in Faial Island, in the center of the Azores island chain. The laurel forest in which it was found has since been destroyed. While the Geometer moth is likely already extinct, the existence and propagation of many other subspecies of its family lend hope that there may be more of this species yet to be discovered.

    *Image of Eupithecia miserulata Grote

  • Species: Torrey Pine (Pinus torreyana)
    18/ yaoshawn //

    Species: Torrey Pine (Pinus torreyana)

    Known as the rarest native pine in America, the Torrey pine is a magnificent tree originally from southern California, with sub-populations in both San Diego and Santa Barbara. Extensive conservation practices are in place for the San Diego trees, which are part of Torrey Pines State Park and have been protected since 1885. A long history of fire damage in Southern California is cause for concern, as the current population of the pines counts less than 5,000 mature individuals.

    *Image of Pinus torreyana var. torreyana Parry ex Carrière

  • Species: Lord Howe Island Stick-insect (Dryococelus australis)
    19/ Granitethighs // Wikicommons

    Species: Lord Howe Island Stick-insect (Dryococelus australis)

    Lord Howe Island is over 400 miles from the mainland of Australia and that’s where the Lord Howe Island Stick-insect resides. In 1918, a ship crashed and introduced rats to the island, which devoured all of the species of stick-insects on Lord Howe Island. The Australian government is planning to eradicate the rats on Lord Howe Island, and the absence of the predators will have a positive impact on all of the stick-insects of the island.


  • Species: Saola (Pseudoryx nghetinhensis)
    20/ Dao Nguyen and James Hardcastle // iNaturalist

    Species: Saola (Pseudoryx nghetinhensis)

    The saola has been called the “Asian unicorn” because the cattle/antelope hybrid has rarely been seen by humans. When it was discovered in 1992 in Vietnam, it was the first new mammal discovery in 50 years. Said to be docile around humans, the already small numbers of this Southeast Asian creature are being further reduced by hunting and the value placed on its scarcity.

  • Species: Destuntzia rubra
    21/ Senckenberg // GBIF

    Species: Destuntzia rubra

    Originally named Hymenogaster ruber back in 1899, this fungus was re-christened Destuntzia rubra in 1985. Out of 13 sites surveyed in the past 30 years in California and Oregon, only five remain. Urban development in the San Francisco area as well as the West Coast has greatly impacted the viability of the Destuntzia rubra.

  • Species: Piedmont Quillwort (Isoetes malinverniana)
    22/ Herbarium of Université de Montpellier 2, Institut de Botanique // GBIF

    Species: Piedmont Quillwort (Isoetes malinverniana)

    Quillwort is an aquatic plant that thrives in fresh, rushing spring water as well as near rice fields. This variety can be found in the northern Italian regions of Piedmont and Lombardy. It received “critically endangered” status when 88% of the population was found to have disappeared. It’s recognized by several major conservation directives like the Convention on the Conservation of European Wildlife and Natural Habitats, but water pollution and inadequate land management are still contributing to the Piedmont quillwort’s demise.

  • Species: Desertas Wolf Spider (Hogna ingens)
    23/ Dominic //

    Species: Desertas Wolf Spider (Hogna ingens)

    First described in 1857 by John Blackwall, the Desertas wolf spider is both large (1.5 inches) and rare as a major predator in its home of Desertas Island, Portugal. When rabbits were expelled from the area in 1996, a previously controlled invasive grass species flourished. This pushed out native herbs and creatures, taking away most of the spiders’ food sources and leading to the decline of their species.

    *Image of Hogna carolinensis

  • Species: Pokemeboy (Acacia anegadensis)
    24/ Harvard University Herbaria // GBIF

    Species: Pokemeboy (Acacia anegadensis)

    The British Virgin Islands are home to the pokemeboy, a legume plant which is under threat by both increased tourism and the rise in sea level that could eventually overwhelm the entire species. On the island of Tortola, there’s a mature individual that is reproducing at the JR O’Neal Botanic Gardens, but the spiky plant is far from thriving.

    *Image of Acacia anegadensis Britton

  • Species: Visayan Warty Pig (Sus cebifrons)
    25/ Justin Klugh // iNaturalist

    Species: Visayan Warty Pig (Sus cebifrons)

    The central Philippine islands are home to these pigs, which have already been eradicated from three of the six islands where they were originally found. While they’re officially protected by law, lax enforcement has led to a significant increase in hunting for their meat, which commands a premium at market. The Visayan Warty Pig Conservation Programme was established in 1992 in an effort to save the species, although the once vulnerable population has descended into critically endangered status.

  • Species: Tahina Palm (Tahina spectabilis)
    26/ MNHN - Museum national d'Histoire naturelle // GBIF

    Species: Tahina Palm (Tahina spectabilis)

    Named one of the top 10 species of 2008 by the International Institute for Species Exploration, the so-called "suicide palm" got its nickname because it only flowers once during its lifetime and then dies soon after. Discovered recently in Madagascar in 2005, there are only 30 known mature palms in existence—they’re threatened mainly by the increased frequency of fires in the region.

  • Species: Yellow-gilled Lepiota (Lepiota luteophylla)
    27/ namycoflora //

    Species: Yellow-gilled Lepiota (Lepiota luteophylla)

    Mycologists believe the last living yellow-gilled Lepiota fungus is somewhere in the groves of Monterey Cypress in central and northern California. That said, it hasn’t been seen since 1976 and there’s a strong chance it’s already extinct. The fungus only grows in larger groves of Monterey Cypress—and the trees themselves are listed as vulnerable, leading to a distressing prognosis for this fungus.

    *Image of Lepiota luteophylla Sundb

  • Species: Florida Cave Shrimp (Palaemonetes cummingi)
    28/ naturelady //

    Species: Florida Cave Shrimp (Palaemonetes cummingi)

    The last known Florida cave shrimp was seen in 1973 in the Squirrel Chimney Cave in Alachua County, Florida. While there haven’t been any recent sightings, there are enough unexplored sinkholes in the cave to merit a “critically endangered” label—for the possibility that these elusive crustaceans may still exist. If that’s the case, the discovery of high numbers of invasive Redeye Chub fish could lead to all-out extinction of P. cummingi, as the fish are known to eat larval shrimp.

    *Image of Lepiota luteophylla Sundb

  • Species: Many-fruited beardless moss (Weissia multicapsularis)
    29/ Pixabay

    Species: Many-fruited beardless moss (Weissia multicapsularis)

    Originally found in both France and England, the many-fruited beardless moss is now completely extinct in France. The only remaining wild specimens are in the U.K.’s historic region of Cornwall, where it grows in two tiny patches measuring less than eight square inches. To save the species, a sample from one of its locations is being kept at the Royal Botanic Gardens in Kew.

    *Image of Cornwall, England; the species is endemic to this region

  • Species: Black Softshell Turtle (Nilssonia nigricans)
    30/ Musée national d'histoire naturelle Luxembourg // GBIF

    Species: Black Softshell Turtle (Nilssonia nigricans)

    The IUCN Red List designates the black softshell turtle as extinct in the wild. That’s because it only exists in a very surprising location: a single man-made pool at a temple in Bangladesh. First classified in 1875, anyone who would like to view the last of the turtles will have to venture to the Baizid Bostami shrine outside of Chitaggong.

    *Image of Nilssonia sp.

  • Species: Dictyota galapagensis
    31/ MNHN - Museum national d'Histoire naturelle // GBIF

    Species: Dictyota galapagensis

    Listed as not only “critically endangered” but also “possibly extinct,” Dictyota galapagensis is a shallow-water seaweed from the Galápagos Islands. Like other algae in the area, the species has been affected so greatly by climate change (specifically El Niño activity), that it hasn’t been observed since the mid-1970s.

    *Image of Dictyota crenulata J.Agardh

  • Species: Honolulu Cyanea (Cyanea acuminata)
    32/ MNHN - Museum national d'Histoire naturelle // GBIF

    Species: Honolulu Cyanea (Cyanea acuminata)

    Hawaii has already been impacted significantly by climate change, but the main threat for the Honolulu Cyanea isn’t the environment—it’s attacks by feral pigs. Also known locally as “Haha,” this bellflower shrub on the island of Oahu is already the subject of rehabilitation plans at Lyon Arboretum and the National Tropical Botanical Garden.

    *Image of Dictyota crenulata J.Agardh

  • Species: Fat-whorled Pondsnail (Stagnicola bonnevillensis)
    33/ Roberto Sindaco // iNaturalist

    Species: Fat-whorled Pondsnail (Stagnicola bonnevillensis)

    Thought to be extinct until 1985, the fat-whorled pondsnail, sometimes known as the Bonneville snail, exists in a very small region of Utah. Human disturbance and pollution (particularly from energy waste and cleaning solvents) are the main reasons why it’s earned “critically endangered” status. It only lives in five spring-fed pools, none of which are currently protected.

    *Image of another species in the Stagnicola genus

  • Species: Gumushanian Tulip (Tulipa gumusanica)
    34/ Natural History Museum, University of Oslo // GBIF

    Species: Gumushanian Tulip (Tulipa gumusanica)

    Found on the rocky slopes of Mt. Zigana in Anatolia, Turkey, this yellow-filamented tulip is threatened by logging, construction, and ironically, the negative effects of ecotourism. While national regulations prohibit the collection of wild tulips, the isolated location and small population of the Gumushanian tulip makes it vulnerable to extinction.

  • Species: Hawksbill Turtle (Eretmochelys imbricata)
    35/ Musée national d'histoire naturelle Luxembourg // GBIF

    Species: Hawksbill Turtle (Eretmochelys imbricata)

    Critically endangered since 1996, the hawksbill turtle is known for its pointy beak and beautiful shell, which is highly valuable on the tortoiseshell market and makes it a target for poachers. Hawksbills can be found in over 70 countries, but their primary habitat is in tropical waters near coral reefs. Sea turtles and their ancestors have existed for 100 million years and serve a vital part of marine ecosystems.

  • Species: Rumplestiltskin Pygmy Grasshopper (Agkistropleuron simplex)
    36/ Herbarium Hamburgense // GBIF

    Species: Rumplestiltskin Pygmy Grasshopper (Agkistropleuron simplex)

    These curiously named grasshoppers are losing their habitats due to deforestation. They only exist in one location in Madagascar; the more forest that’s cut down, the fewer Rumplestiltskin pygmy grasshoppers the world will know.

    *Image of Thalictrum simplex subsp. simplex

  • Species: Sinai Primrose (Primula boveana)
    37/ Staatliche Naturwissenschaftliche Sammlungen Bayerns // GBIF

    Species: Sinai Primrose (Primula boveana)

    The Sinai primrose lives in Egypt's Sinai desert—specifically, the St. Katherine Protectorate national park. Limited to just one area of less than four square miles, the long-stemmed perennial’s population is currently less than 200 plants. Climate change is responsible for the plant’s decline; the Medicinal Plants Conservation Project is attempting to store seeds to preserve its place in the world.

    *Image of Primula boveana Decne.

  • Species: Bornean Orangutan (Pongo pygmaeus)
    38/ Tommy //

    Species: Bornean Orangutan (Pongo pygmaeus)

    The Bornean orangutan has become a bit of a celebrity, thanks to the success of the “Planet of the Apes” franchise. Native to Borneo, it is present in both the Indonesian and Malaysian parts of the island. Unfortunately, the orangutan's numbers have dwindled significantly due to habitat degradation and hunting, which has led to an 86% population decrease since 1973.

  • Species: Floreana Coral (Tubastraea floreana)
    39/ Andrew Deacon //

    Species: Floreana Coral (Tubastraea floreana)

    Many species of the Galápagos archipelago have become threatened due to climate change and this coral is no different. The species is found mainly on cave ceilings, rock overhangs, and ledges. Scientists link the rise in ocean temperature, specifically due to the 1982–1983 El Niño event, to the coral’s troubled fate.

    *Image of Tubastraea diaphana

  • Species: Black-Breasted Puffleg (Eriocnemis nigrivestis)
    40/ Brandon Li // iNaturalist

    Species: Black-Breasted Puffleg (Eriocnemis nigrivestis)

    Deforestation is the main culprit behind the near-eradication of the black-breasted puffleg, a type of hummingbird. A massive 93% of its suitable habitat in the volcanic regions of Ecuador has been degraded or destroyed. Dubbed the “emblematic bird of Quito,” groups like the Jocotoco Foundation are doing their best to keep the species alive.

  • Species: Clanwilliam Cedar (Widdringtonia cedarbergensis)
    41/ MNHN - Museum national d'Histoire naturelle // GBIF

    Species: Clanwilliam Cedar (Widdringtonia cedarbergensis)

    South Africa’s Cedarberg Mountains are home to the Clanwilliam cedar, a tree that used to be abundant in the area—until European settlers arrived in the 1800s and used the majority of it for timber. Now only 5% of the original stocks remain, and fire is a serious threat to the cedar’s survival. Major restoration efforts are underway, but few have proven successful thus far.

  • Species: Perionychella ngakawau
    42/ Alex Fergus //

    Species: Perionychella ngakawau

    These New Zealand earthworms live in the Happy Valley site of the Ngakawau Ecological District, one of New Zealand’s 268 ecological districts that resides on the northwest coast of the island nation. Coal mining in the region has led to a rapid decline in the species’ habitat, which could lead to further degradation of the population.

    *Image of Phyllocladus alpinus Hook.f.

  • Species: Lepiota rhodophylla
    43/ Vellinga, Else. (2006). Lepiotaceous fungi in California, U.S.A. - 2. Lepiota rhodophylla sp. nov. Mycotaxon -Ithaca Ny-. 98. Fig. 1.

    Species: Lepiota rhodophylla

    Easily identifiable by its pink outer membrane and short sporocarps (the area where spore-producing structures develop), the Lepiota rhodophylla fungus is another endangered species that relies on large Monterey Cypress groves of California for its habitat. As the groves fall prey to diseases like Cypress Canker and forest fires, the fungus is at risk of losing its home.

  • Species: Red-legged Fire-Millipede (Aphistogoniulus corallipes)
    44/ Dan Olsen // Shutterstock

    Species: Red-legged Fire-Millipede (Aphistogoniulus corallipes)

    The forest of Manantantely is a private reserve near the southern coast of Madagascar, and it’s the only place on the planet to find the red-legged fire-millipede. Logging and a history of slash-and-burn agricultural practices have created an atmosphere of doom for this crimson-legged crawler.

  • Species: Spatoglossum schmittii
    45/ National Museum of Natural History, Smithsonian Institution // GBIF

    Species: Spatoglossum schmittii

    Add Spatoglossum schmittii to the list of Ecuadorian/Galápagos Island casualties from El Niño-related climate change. Mainly found in the Galápagos Marine Reserve, this brown seaweed has been studied for its impact on human diseases. If no more specimens can be found, the possibility of using S. schmittii to aid humankind will disappear.

  • Species: Southern Bluefin Tuna (Thunnus maccoyii)
    46/ aes256 // Wikimedia Commons

    Species: Southern Bluefin Tuna (Thunnus maccoyii)

    One of the most tragic stories in the fishing world, the southern bluefin tuna has seen its numbers rapidly decline because of its popularity amongst sushi lovers. Native everywhere from Argentina, to South Africa, to New Zealand, this species can grow close to 450 pounds—but overfishing is so pronounced that worldwide stocks of the bluefin tuna could reduce to just 500 mature fish in the next 100 years.

  • Species: Greater Fungus Weevil (Homoeodera major)
    47/ Peter Neaum // Wikimedia Commons

    Species: Greater Fungus Weevil (Homoeodera major)

    Found in just three locations on the island of St. Helena in the Atlantic Ocean, the greater fungus weevil makes its home primarily in the dead wood of so-called cabbage trees. Invasive predators have impacted their survival rates, as has the lack of newly dead wood for the weevil larvae feast upon.

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