Cities Can Help Migrating Birds on Their Way By Planting More Trees and Turning Lights Off at Night
By Frank La Sorte and Kyle Horton
Millions of birds travel between their breeding and wintering grounds during spring and autumn migration, creating one of the greatest spectacles of the natural world. These journeys often span incredible distances. For example, the Blackpoll warbler, which weighs less than half an ounce, may travel up to 1,500 miles between its nesting grounds in Canada and its wintering grounds in the Caribbean and South America.
Blackpoll warbler abundance in breeding, non-breeding and migration seasons. Cornell Lab of Ornithology / CC BY-ND
<p>For many species, these journeys take place at night, when skies typically are calmer and predators are less active. Scientists do not have a good understanding yet of how birds navigate effectively at night over long distances.</p><p><span></span>We study bird migration and how it is being affected by factors ranging from <a href="https://scholar.google.com/citations?user=S04C3UMAAAAJ&hl=en" target="_blank">climate change</a> to <a href="https://scholar.google.com/citations?user=pPk38-8AAAAJ&hl=en" target="_blank">artificial light at night</a>. In a recent study, we used millions of bird observations by citizen scientists to document the <a href="https://doi.org/10.1016/j.envpol.2020.116085" target="_blank">occurrence of migratory bird species in 333 U.S. cities</a> during the winter, spring, summer and autumn.</p>Blackpoll warbler. PJTurgeon / Wikipedia
<p>We used this information to determine how the number of migratory bird species varies based on each city's level of <a href="https://www.britannica.com/science/light-pollution" target="_blank" rel="noopener noreferrer">light pollution</a> – brightening of the night sky caused by artificial light sources, such as buildings and streetlights. We also explored how species numbers vary based on the quantity of tree canopy cover and impervious surface, such as concrete and asphalt, within each city. Our findings show that cities can help migrating birds by planting more trees and reducing light pollution, especially during spring and autumn migration.</p>Declining Bird Populations
<p>Urban areas contain numerous dangers for migratory birds. The biggest threat is the risk of <a href="https://doi.org/10.1650/CONDOR-13-090.1" target="_blank">colliding with buildings or communication towers</a>. Many migratory bird populations have <a href="http://dx.doi.org/10.1126/science.aaw1313" target="_blank">declined over the past 50 years</a>, and it is possible that light pollution from cities is contributing to these losses.</p><p>Scientists widely agree that light pollution can <a href="https://doi.org/10.1073/pnas.1708574114" target="_blank">severely disorient migratory birds</a> and make it hard for them to navigate. Studies have shown that birds will cluster around brightly lit structures, much like insects flying around a porch light at night. Cities are the <a href="https://doi.org/10.1002/fee.2029" target="_blank" rel="noopener noreferrer">primary source of light pollution for migratory birds</a>, and these species tend to be more abundant within cities <a href="https://onlinelibrary.wiley.com/doi/abs/10.1111/gcb.13792" target="_blank" rel="noopener noreferrer">during migration</a>, especially in <a href="https://doi.org/10.1016/j.landurbplan.2020.103892" target="_blank" rel="noopener noreferrer">city parks</a>.</p>Composite image of the continental U.S. at night from satellite photos. NASA Earth Observatory images by Joshua Stevens, using Suomi NPP VIIRS data from Miguel Román, NASA's Goddard Space Flight Center
The Power of Citizen Science
<p>It's not easy to observe and document bird migration, especially for species that migrate at night. The main challenge is that many of these species are very small, which limits scientists' ability to use electronic tracking devices.</p><p>With the growth of the internet and other information technologies, new data resources are becoming available that are making it possible to overcome some of these challenges. <a href="https://doi.org/10.1038/d41586-018-07106-5" target="_blank">Citizen science initiatives</a> in which volunteers use online portals to enter their observations of the natural world have become an important resource for researchers.</p><p>One such initiative, <a href="https://ebird.org/home" target="_blank" rel="noopener noreferrer">eBird</a>, allows bird-watchers around the globe to share their observations from any location and time. This has produced one of the <a href="https://doi.org/10.1111/ecog.04632" target="_blank" rel="noopener noreferrer">largest ecological citizen-science databases in the world</a>. To date, eBird contains over 922 million bird observations compiled by over 617,000 participants.</p>Light Pollution Both Attracts and Repels Migratory Birds
<p>Migratory bird species have evolved to use certain migration routes and types of habitat, such as forests, grasslands or marshes. While humans may enjoy seeing migratory birds appear in urban areas, it's generally not good for bird populations. In addition to the many hazards that exist in urban areas, cities typically lack the food resources and cover that birds need during migration or when raising their young. As scientists, we're concerned when we see evidence that migratory birds are being drawn away from their traditional migration routes and natural habitats.</p><p>Through our analysis of eBird data, we found that cities contained the greatest numbers of migratory bird species during spring and autumn migration. Higher levels of light pollution were associated with more species during migration – evidence that light pollution attracts migratory birds to cities across the U.S. This is cause for concern, as it shows that the influence of light pollution on migratory behavior is strong enough to increase the number of species that would normally be found in urban areas.</p><p>In contrast, we found that higher levels of light pollution were associated with fewer migratory bird species during the summer and winter. This is likely due to the scarcity of suitable habitat in cities, such as large forest patches, in combination with the adverse affects of light pollution on bird behavior and health. In addition, during these seasons, migratory birds are active only during the day and their populations are largely stationary, creating few opportunities for light pollution to attract them to urban areas.</p>Trees and Pavement
<p>We found that tree canopy cover was associated with more migratory bird species during spring migration and the summer. Trees provide important habitat for migratory birds during migration and the breeding season, so the presence of trees can have a strong effect on the number of migratory bird species that occur in cities.</p><p>Finally, we found that higher levels of impervious surface were associated with more migratory bird species during the winter. This result is somewhat surprising. It could be a product of the <a href="https://www.epa.gov/heatislands" target="_blank">urban heat island effect</a> – the fact that structures and paved surfaces in cities absorb and reemit more of the sun's heat than natural surfaces. Replacing vegetation with buildings, roads and parking lots can therefore make cities significantly warmer than surrounding lands. This effect could reduce cold stress on birds and increase food resources, such as insect populations, during the winter.</p><p>Our research adds to our understanding of how conditions in cities can both help and hurt migratory bird populations. We hope that our findings will inform urban planning initiatives and strategies to reduce the harmful effects of cities on migratory birds through such measures as <a href="https://www.arborday.org/programs/treecityusa/index.cfm" target="_blank" rel="noopener noreferrer">planting more trees</a> and initiating <a href="https://aeroecolab.com/uslights" target="_blank" rel="noopener noreferrer">lights-out programs</a>. Efforts to make it easier for migratory birds to complete their incredible journeys will help maintain their populations into the future.</p><p><em><span style="background-color: initial;"><a href="https://theconversation.com/profiles/frank-la-sorte-1191494" target="_blank">Frank La Sorte</a> is a r</span>esearch associate at the </em><em>Cornell Lab of Ornithology, Cornell University. <a href="https://theconversation.com/profiles/kyle-horton-1191498" target="_blank">Kyle Horton</a> is an assistant professor of Fish, Wildlife, and Conservation Biology at the Colorado State University.</em></p><p><em></em><em>Disclosure statement: Frank La Sorte receives funding from The Wolf Creek Charitable Foundation and the National Science Foundation (DBI-1939187). K</em><em>yle Horton does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.</em></p><p><em>Reposted with permission from <a href="https://theconversation.com/cities-can-help-migrating-birds-on-their-way-by-planting-more-trees-and-turning-lights-off-at-night-152573" target="_blank">The Conversation</a>. </em></p>EcoWatch Daily Newsletter
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Spruce
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<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yNDY4NjIxOS9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTY1NzExNTgyMX0.D6qMGYllKTsVhEkQ-L_GzpDHVu60a-tJKcio7M1Ssmc/img.jpg?width=980" id="94e4a" class="rm-shortcode" data-rm-shortcode-id="3609a52479675730893a45a82a03c71d" data-rm-shortcode-name="rebelmouse-image" alt="nuleaf naturals organic cbd oil" data-width="600" data-height="600" /><p>As an industry-leading brand, it comes as no surprise that NuLeaf Naturals sources its CBD extract from organic hemp plants grown on licensed farms in Colorado. The comany's CBD oils only contain two ingredients: USDA certified organic hemp seed oil and full spectrum hemp extract.</p><p>NuLeaf Naturals uses one proprietary CBD oil formula for all of its products, so you will get the same CBD potency in each tincture (60mg per mL), but can purchase different bottle sizes depending on how much you intend to use.</p>Charlotte's Web
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By Marie Quinney and Gabriela Martinez
This article is part of The Davos Agenda.
During 2020, many of us saw images of deserted urban areas being reclaimed by animals and heard reports of carbon dioxide emissions plummeting as transportation ground to a halt. A new analysis shows that the U.S. had reached its lowest level of emissions in three decades.
NO₂ levels in the air above India (U.S. date format). World Economic Forum
Human activity is destroying our natural world. World Economic Forum Nature Risk Rising
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By Andrew Smith
Climate change is harming many special places and iconic species around our planet, from Glacier National Park's disappearing glaciers to California redwoods scorched by wildfires. But for the animal I study, the American pika (Ochotona princeps), there's actually some good news: It's not as threatened by climate change as many studies have warned.
American pikas live mainly in alpine and subalpine mountain areas extending south from central British Columbia and Alberta into the Rocky Mountains of New Mexico and the Sierra Nevada of California. Andrew Smith, CC BY-ND
Pikas have disappeared from some parts of the Great Basin, but climate change may not have been the cause. Kmusser / Wikipedia, CC BY-S
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One of the most enduring tropes about crocodiles is to describe them as "living fossils." They are cold, slow moving and scaly, so they look like how one might picture a dinosaur. Like many clichés, there is an element of truth to this comparison. The crocodiles from 200 million years ago look surprisingly like the ones we know today.
The Philippine crocodile is one of 24 species of crocodilian alive today. Wikimedia, CC BY 3.0
Unfamiliar crocodiles from prehistory. Author provided
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By Georgina Kenyon
Earlier this year, the term "bat tornado" started appearing in the Australian and international media. It all started with a BBC report from the town of Ingham in the northeastern state of Queensland, where the population of flying fox bats had apparently "exploded" over the last two years, leaving residents fed up with their noise and smell.
Travelers in Search of Wood and Water
<p>The Australian mainland has four species of flying fox — also known as <a href="https://www.dw.com/en/zambia-incredible-flight-of-the-fruit-bats/a-36825859" target="_blank">fruit bats</a> — two of which are listed as nationally protected species. Some can reach a wingspan of 1.5 meters.</p><p>Flying fox camps have been likened to railway stations, where crowds of the animals come and go each day. They may travel up to 50 kilometers (30 miles) in a single night, and 1,000 kilometers (620 miles) seasonally, depending on food availability. </p><p>They also need a good source of water, drinking small amounts frequently to stay hydrated without weighing themselves down in flight. Susan Island, located in the middle of the Clarence River that runs through the city of Grafton, has become an ideal congregation spot. </p><p>But climate change and deforestation are making their movements less predictable. As their habitat is lost or water sources dry up, <a href="https://www.dw.com/en/australia-heat-wave-brain-frying-bats/a-42078045" target="_blank">they seek refuge</a> in urban or suburban areas. "They're being forced into areas they would not normally be," said Tim Pearson, an ecologist and chair of the NGO Sydney Bats. </p><p>And while some Australian towns may be seeing an influx of flying foxes, nationally, their numbers have dropped significantly. </p>Perishing in the Heat
<p>Extreme temperatures over recent years have wiped out thousands — sometimes even tens of thousands — of animals at a time, with media reports showing heaps of corpses where they have fallen from trees suffering extreme heat stress.</p><p>Australia experienced the hottest November on record this year, with temperatures reaching the mid-40 degrees Celsius in some regions.</p><p>And bats are more exposed to heat in towns and suburbs where they don't have the protection of thick forest. </p><p>"This latest catastrophe to befall some of Australia's largest bat species is a symptom of a much larger problem — Australia's deforestation crisis," said Matt Brennan, head of Tasmania-based Wilderness Society. "Eastern Australia is now a designated global deforestation hotspot, alongside places like the Amazon, the Congo and Borneo." </p>Extending a Helping Hand
<p>Some towns are trying to help them. Yarra City council in Melbourne has installed sprinkler systems where flying foxes come to breed in huge colonies on the Yarra River, to try and keep them cool. </p><p>And along the Parramatta River in Sydney, the New South Wales state government has helped fund a project to plant trees to provide the bats with more habitat and shade.</p><p>However, these well-intentioned interventions don't always hit the mark. Pearson says sprinklers can startle heat-exhausted animals, increasing their stress levels. And ultimately, making urban environments more hospitable to bats is no substitute for preserving the forests where they are naturally at home.</p><p>"You can plant trees to give the flying foxes more habitat, but the real problem is climate change and ongoing deforestation," said Pearson. </p>Bats Need Forests, and Forests Need Bats
<p>While flying foxes suffer from loss of trees, loss of fruit bats is, in turn, bad news for trees. As flying foxes pop their heads into flowers to feed on nectar, or consume fruit and excrete the seeds, they help eucalypts, melaleucas, banksias and many species of rainforest trees and vines, to reproduce.</p><p>Pearson warns that if we don't address climate change and halt deforestation, Australia's flying fox numbers will fall so low within the next few decades, they will no longer be able perform this vital role.</p><p>"I think they will survive in some pockets along the coast where there is food and water," he said, "but they will not be acting as the pollinators and seed dispersers that are so necessary for our forests to survive." </p>Learning to Love Our Winged Neighbors
<p>Pearson is among the flying fox's fiercest defenders. He's studying their vocalizations and says the din their human neighbors complain about is actually the highly developed communication of an intelligent and intensely social species. </p><p>He wants the public to stop seeing them as disease-carrying invaders and start appreciating fruit bats for the extraordinary animals they are: "It's through educating people, raising awareness about how important these flying foxes are for ecosystem health that we may be able to save them."</p><p>In Grafton, spectators now sometimes gather to watch them on their nightly search for food. </p><p>"When I realized people were coming from around Australia just to see the bats here out of curiosity, I started to find out more about them, appreciate them," said Taylor. "People actually row out to the island to see them!" </p><p>"I guess the bats are kind of funky," she admits.</p><p><em>Reposted with permission from </em><em><a href="https://www.dw.com/en/flying-foxes-australias-love-hate-relationship-with-fruit-bats/a-55949095" target="_blank">Deutsche Welle</a>.</em><a href="https://www.ecowatch.com/r/entryeditor/2649780401#/" target="_self"></a></p>Trending
By Malavika Vyawahare
Humans are driving species to extinction 1,000 times faster than what is considered natural. Now, new research underscores the extent of the planet's impoverishment.
A baby African elephant at Kruger National Park. Rhett A. Butler
A Bornean rhino. Jeremy Hance and Tiffany Roufs / Mongabay
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By John R. Platt
A few months ago a group of scientists warned about the rise of "extinction denial," an effort much like climate denial to mischaracterize the extinction crisis and suggest that human activity isn't really having a damaging effect on ecosystems and the whole planet.
19th-century drawings of orchid species recently declared extinct in Bangladesh.
<p><strong><a href="https://www.iucnredlist.org/species/123423283/123424374" target="_blank" rel="noopener noreferrer">Smooth handfish (<em>Sympterichthys unipennis</em>)</a></strong><strong> </strong>— One of the few extinctions of 2020 that received much <a href="https://www.scientificamerican.com/article/smooth-handfish-extinction-marks-a-sad-milestone/" target="_blank">media attention</a>, and it's easy to see why. Handfish are an unusual group of species whose front fins look somewhat like human appendages, which they use to walk around the ocean floor. The smooth species, which hasn't been seen since 1802, lived off the coast of Tasmania and was probably common when it was first collected by naturalists. Bottom fishing, pollution, habitat destruction, bycatch and other threats are all listed as among the probable reasons for its extinction. Even though the local fishery collapsed more than 50 years ago, the remaining handfish species are still critically endangered, so this extinction should serve as an important wake-up call to save them.</p><p><a href="https://therevelator.org/plant-species-extinct-america/" target="_blank"><strong>65 North American plants</strong></a> — This past year researchers set out to determine how many plants in the continental United States had been lost. They catalogued 65, including five small trees, eight shrubs, 37 perennial herbs and 15 annual herbs. Some of these had been reported before, but for most this is the first time they've been declared extinct. The list includes <a href="https://therevelator.org/extinction-hotspot-appalachia/" target="_blank" rel="noopener noreferrer"><em>Marshallia grandiflora</em></a>, a large flowing plant from the American Southeast that was declared its own species this past year. Too bad it was last seen in 1919 (and has been confused with other species for even longer).</p>The original Marshallia grandiflora holotype. Smithsonian NMNH / Creative Commons
<p><strong></strong><strong>22 frog species</strong> — The IUCN this year declared nearly two dozen long-unseen Central and South American frog species as "critically endangered (possibly extinct)" — victims of the amphibian-killing <a href="https://therevelator.org/extinct-frogs-golden-goose/" target="_blank">chytrid fungus</a>. They include the <a href="https://www.iucnredlist.org/species/56423/109538689" target="_blank">Aragua robber frog (<em>Pristimantis anotis</em>)</a>, which hasn't been observed in 46 years, and the <a href="https://www.iucnredlist.org/species/54542/109529302" target="_blank">Piñango stubfoot toad (<em>Atelopus pinangoi</em>)</a>, which mostly disappeared in the 1980s. A single juvenile toad observed in 2008 leads scientists to say this species "is either possibly extinct or if there is still an extant population, that it is very small (<50 mature individuals)."</p><p><strong><a href="https://www.iucnredlist.org/species/54498/54340769" target="_blank">Chiriqui harlequin frog (<em>Atelopus chiriquiensis</em>)</a> and <a href="https://www.iucnredlist.org/species/55201/54344718" target="_blank">splendid poison frog (<em>Oophaga speciosa</em>)</a> </strong>— Last seen in 1996 and 1992, these frogs from Costa Rica and Panama fell victim to the chytrid fungus and were declared extinct in December.</p><p><strong><a href="https://phys.org/news/2020-09-mite-extinctions-natural.html" target="_blank" rel="noopener noreferrer">15% of mite species</a> </strong>— This requires a lot more research, but a paper published this past August announced "evidence of widespread mite extinctions" since the year 2000 following similar disappearances of plants and vertebrates. Mites may not look or sound important, but they play key roles in their native ecosystems. If 15% of the world's 1.25 million mite species have been lost, we're talking more than 8,300 extinctions — a number the researchers predict will continue to rise.</p><p><a href="https://onlinelibrary.wiley.com/doi/abs/10.1111/ibi.12839" target="_blank" rel="noopener noreferrer"><strong>Simeulue Hill mynas</strong></a> — An alarming paper called this an "extinction-in-process" of a previously undescribed bird that probably went extinct in the wild in the past two to three years due to overcollection for the songbird trade. A few may still exist in captivity — for now.<strong></strong></p><p><strong>17 freshwater fish from Lake Lanao, Mindanao, the Philippines </strong>— A combination of predatory invasive species, overharvesting and destructing fishing methods (such as dynamite fishing) wiped these lost species out. The IUCN this year listed 15 of the species as "extinct" following extensive searches and surveys; the remaining two as "critically endangered (possibly extinct)." The predators, by the way, are still doing just fine. Here are the 15 extinct species:</p><ul><li><a href="https://www.iucnredlist.org/species/18888/90996412" target="_blank" rel="noopener noreferrer"><em>Barbodes disa</em></a> — last seen in 1964.</li><li><a href="https://www.iucnredlist.org/species/15634/90997535" target="_blank" rel="noopener noreferrer"><em>Barbodes truncatulus</em></a> – last seen in 1973.</li><li><a href="https://www.iucnredlist.org/species/4135/90997158" target="_blank" rel="noopener noreferrer"><em>Barbodes pachycheilus</em></a> – last seen in 1964.</li><li><a href="https://www.iucnredlist.org/species/15633/90997194" target="_blank" rel="noopener noreferrer"><em>Barbodes palaemophagus</em></a> – last seen in 1975.</li><li><a href="https://www.iucnredlist.org/species/18882/90996027" target="_blank" rel="noopener noreferrer"><em>Barbodes amarus</em></a> – Last seen in 1982.</li><li><a href="https://www.iucnredlist.org/species/18904/90997073" target="_blank" rel="noopener noreferrer"><em>Barbodes manalak</em></a> – Once a commercially valuable fish, last seen in 1977.</li><li><a href="https://www.iucnredlist.org/species/18886/90996370#assessment-information" target="_blank" rel="noopener noreferrer"><em>Barbodes clemensi</em></a> – last seen in 1975.</li><li><a href="https://www.iucnredlist.org/species/18889/90996574" target="_blank" rel="noopener noreferrer"><em>Barbodes flavifuscus</em></a> – last seen in 1964.</li><li><a href="https://www.iucnredlist.org/species/18891/90996925" target="_blank" rel="noopener noreferrer"><em>Barbodes katolo</em></a> – last seen in 1977.</li><li><a href="https://www.iucnredlist.org/species/20687/90997252" target="_blank" rel="noopener noreferrer"><em>Barbodes palata</em></a> – last seen in 1964.</li><li><a href="https://www.iucnredlist.org/species/18884/90996105" target="_blank" rel="noopener noreferrer"><em>Barbodes baoulan</em></a> — last seen in 1991.</li><li><a href="https://www.iucnredlist.org/species/18890/90996625" target="_blank" rel="noopener noreferrer"><em>Barbodes herrei</em></a> — last seen in 1974, when just 40 pounds' worth of fish were caught.</li><li><a href="https://www.iucnredlist.org/species/18892/90996974" target="_blank" rel="noopener noreferrer"><em>Barbodes lanaoensis</em></a> — last seen in 1964.</li><li><a href="https://www.iucnredlist.org/species/12751/90997332" target="_blank" rel="noopener noreferrer"><em>Barbodes resimus</em></a> — last seen in 1964.</li><li><a href="https://www.iucnredlist.org/species/18901/90997500" target="_blank" rel="noopener noreferrer"><em>Barbodes tras</em></a> — last seen in 1976.</li></ul>Some of the extinct species from Lake Lanao. Photo © Armi G. Torres courtesy IUCN.
<p><strong><a href="https://www.iucnredlist.org/species/17365/22123157" target="_blank" rel="noopener noreferrer">Bonin pipistrelle (<em>Pipistrellus sturdeei</em>)</a></strong><strong> </strong>— Scientists only recorded this Japanese bat one time, back in the 19th century. The IUCN listed it as "data deficient" from 2006 to 2020, a period during which its taxonomy was under debate, but a paper published in March <a href="https://www.biotaxa.org/Zootaxa/article/view/zootaxa.4755.1.8" target="_blank">settled that issue</a>, and the latest Red List update placed the species in the the extinct category. The Japanese government itself has listed the bat as extinct since 2014.<strong></strong></p><p><strong><a href="https://www.iucnredlist.org/species/44792108/44798207" target="_blank"><em>Pseudoyersinia brevipennis</em></a> </strong>— This praying mantis from France hasn't been seen since 1860. Its declared extinction comes after some extended (and still unresolved) debate over its validity as a unique species.</p><p><a href="https://www.iucnredlist.org/species/123986030/123986038" target="_blank" rel="noopener noreferrer"><em><strong>Agave lurida</strong></em></a> — Last seen in Oaxaca, Mexico, in 2001, this succulent was finally declared extinct in the wild this year after numerous expeditions searching for remaining plants. As the IUCN Red List notes, "There are only a few specimens left in <em>ex-situ</em> collections, which is a concern for the extinction of the species in the near future."</p><p><strong><a href="https://www.iucnredlist.org/species/136808736/137376234" target="_blank" rel="noopener noreferrer">Falso Maguey Grande (<em>Furcraea macdougallii</em>)</a> </strong>— Another Oaxacan succulent that's extinct in the wild but still exists in cultivated form (you can buy these cacti online today for as little as $15). Last seen growing naturally in 1973, the plant's main habitat was degraded in 1953 to make way for agave plantations for mezcal production. Wildfires may have also played a role, but the species' limited distribution also made it easier to kill it off: "The restricted range of the species also made it very vulnerable to small local disturbances, and hence the last few individuals were easily destroyed," according to the IUCN.</p><p><strong><a href="https://www.iucnredlist.org/species/140416589/140416594" target="_blank" rel="noopener noreferrer"><em>Eriocaulon inundatum</em></a> </strong>— Last scientifically collected in Senegal in 1943, this pipewort's only know habitat has since been destroyed by salt mining.</p><p><strong><a href="https://www.iucnredlist.org/species/113204000/113309830" target="_blank" rel="noopener noreferrer"><em>Persoonia laxa</em></a> </strong>— This shrub from New South Wales, Australia, was collected just two times — in 1907 and 1908 — in habitats that have since become "highly urbanized." The NSW government still lists it as "<a href="https://www.environment.nsw.gov.au/threatenedSpeciesApp/profile.aspx?id=20230" target="_blank" rel="noopener noreferrer">presumed extinct</a>," but the IUCN placed it fully in the "extinct" category in 2020.</p><p><strong><a href="https://www.iucnredlist.org/species/147088627/149821996" target="_blank" rel="noopener noreferrer">Nazareno (<em>Monteverdia lineata</em>)</a> </strong>— Scientific papers declared this Cuban flowing plant species extinct in 2010 and 2015, although it wasn't catalogued in the IUCN Red List until this year. It grew in a habitat now severely degraded by agriculture and livestock farming.<strong></strong></p><p><strong><a href="https://www.iucnredlist.org/species/113168368/185558142" target="_blank" rel="noopener noreferrer">Wynberg conebush<em> (Leucadendron grandiflorum)</em></a> </strong>— This South African plant hasn't been seen in more than 200 years and was long considered the <a href="https://wynbergresidents.wordpress.com/2016/12/01/remembering-a-lost-wynberg-flower/" target="_blank" rel="noopener noreferrer">earliest documented extinction from that country</a>, although it only made it to the IUCN Red List recently. Its sole habitat "was the location of the earliest colonial farms," including vineyards.</p><p><a href="https://www.iucnredlist.org/species/113166006/185559739" target="_blank" rel="noopener noreferrer"><strong>Wolseley conebush (<em>Leucadendron spirale</em>)</strong></a> — Another South African plant, this one last seen in 1933 and since extensively sought after, including high <a href="https://www.proteaatlas.org.za/ldspir.htm" target="_blank" rel="noopener noreferrer">rewards</a> for its rediscovery. The IUCN says the cause of its extinction is unknown "but is likely the result of habitat loss to crop cultivation, alien plant invasion and afforestation." Oh yeah, and it probably didn't help that in 1809 a scientist wrote that the species possessed "<a href="https://www.ispotnature.org/communities/southern-africa/view/observation/545420/the-ugly-duckling-conebush-wolseley-conebush" target="_blank" rel="noopener noreferrer">little beauty</a>" and discouraged it from further collection.</p><p><a href="https://www.iucnredlist.org/species/169838762/169838772" target="_blank" rel="noopener noreferrer"><em><strong>Schizothorax saltans</strong></em></a> — This fish from Kazakhstan was last seen in 1953, around the time the rivers feeding its lake habitats were drained for irrigation. The IUCN did not assess the species before this past year.</p><p><strong><a href="https://www.iucnredlist.org/species/190888/1960457" target="_blank" rel="noopener noreferrer"><em>Alphonsea hortensis</em></a> </strong>— Declared "extinct in the wild" this year after no observations since 1969, the last specimens of this Sri Lankan tree species now grow at Peradeniya Royal Botanic Garden.</p><p><a href="https://www.iucnredlist.org/species/15006/22009211" target="_blank" rel="noopener noreferrer"><strong>Lord Howe long-eared bat (<em>Nyctophilus howensis</em>)</strong></a> — This island species is known from a single skull discovered in 1972. Conservationists held out hope that it still existed following several possible sightings, but those hopes have now been dashed.</p><p><a href="https://www.iucnredlist.org/species/126612397/126613386" target="_blank" rel="noopener noreferrer"><em><strong>Deppea splendens</strong></em></a> — This IUCN declared this beautiful plant species "extinct in the wild" this year. All living specimens exist only because botanist Dennis Breedlove, who discovered the species in 1973, collected seeds before the plant's sole habitat in Mexico was <a href="https://www.anniesannuals.com/plants/view/?id=2209" target="_blank" rel="noopener noreferrer">plowed over</a> to make way for farmland. Now known as a "holy grail" for some gardeners, cultivated plants descended from Breedlove's seeds can be purchased online for as little as $16.95.</p><p><strong><a href="https://www.iucnredlist.org/species/54549/54358350" target="_blank" rel="noopener noreferrer">Pass stubfoot toad (<em>Atelopus senex</em>)</a> </strong>— Another Costa Rican chytrid victim, last seen in 1986.</p><p><strong><a href="https://www.iucnredlist.org/species/56782/54369332#threats" target="_blank" rel="noopener noreferrer"><em>Craugastor myllomyllon</em></a> </strong>— A Guatemalan frog that never had a common name and hasn't been seen since 1978 (although it wasn't declared a species until 2000). Unlike the other frogs on this year's list, this one disappeared before the chytrid fungus arrived; it was likely wiped out when agriculture destroyed its only habitat.</p><p><strong><a href="https://www.iucnredlist.org/species/44791445/170111359" target="_blank" rel="noopener noreferrer">Spined dwarf mantis (<em>Ameles fasciipennis</em>)</a> </strong>— This Italian praying mantis was only scientifically collected once, in or around 1871, and never seen again. The IUCN says the genus's taxonomy is "rather confusing and further analysis need to be done to confirm the validity of this species." Here's what we do know, though: There are none to be found today, despite extensive surveys.</p><p><strong><a href="https://www.iucnredlist.org/species/140414966/140414986" target="_blank" rel="noopener noreferrer"><em>Scleria chevalieri</em></a> </strong>— This Senagalese plant, last seen in 1929, once grew in swamps that have since been drained to irrigate local gardens.</p><p><strong><a href="https://www.iucnredlist.org/species/33562/83804687" target="_blank" rel="noopener noreferrer">Hawai'i yellowwood (<em>Ochrosia kilaueaensis</em>)</a> </strong>— This tree hasn't been seen since 1927. Its rainforest habitat has been severely degraded by invasive plants and goats, as well as fires. It's currently listed as <a href="https://ecos.fws.gov/ecp/species/5248" target="_blank" rel="noopener noreferrer">endangered</a> under the U.S. Endangered Species Act, but the IUCN declared it extinct this past year.</p><p><strong><a href="https://www.iucnredlist.org/species/38690/87708976#threats" target="_blank" rel="noopener noreferrer"><em>Roystonea stellate</em></a> </strong>— Scientists only collected this Cuban palm tree a single time, back in 1939. Several searches have failed to uncover evidence of its continued existence, probably due to conversion of its only habitats to coffee plantations.</p><p><strong><a href="https://www.iucnredlist.org/species/59376/54381158" target="_blank" rel="noopener noreferrer">Jalpa false brook salamander (<em>Pseudoeurycea exspectata</em>)</a> </strong>— Small farms, cattle grazing and logging appear to have wiped out this once-common Guatemalan amphibian, last seen in 1976. At least 16 surveys since 1985 did not find any evidence of the species' continued existence.</p><p><strong><a href="https://www.iucnredlist.org/species/126612753/126613426#assessment-information" target="_blank" rel="noopener noreferrer"><em>Faramea chiapensis</em></a> </strong>— Only collected once in 1953, this Mexican plant lost its cloud-forest habitat to colonialism and deforestation.</p><p><strong><a href="https://www.iucnredlist.org/species/31679/149812995" target="_blank" rel="noopener noreferrer"><em>Euchorium cubense</em></a> </strong>— Last seen in 1924, this Cuban flowing plant — the only member of its genus — has long been assumed lost. The IUCN characterized it as extinct in 2020 along with <a href="https://www.iucnredlist.org/species/35254/149816104#assessment-information" target="_blank" rel="noopener noreferrer"><em>Banara wilsonii</em></a>, another Cuban plant last seen in 1938 before its habitat was cleared for a sugarcane plantation.</p><p><strong><a href="https://www.iucnredlist.org/species/110097724/110113066#text-fields" target="_blank" rel="noopener noreferrer"><em>Aloe silicicola</em></a> </strong>— Last seen in 1920, this plant from the mountains of Madagascar enters the IUCN Red List as "extinct in the wild" due to a vague reference that it still exists in a botanical garden. Its previous habitat has been the site of frequent fires.</p><p><strong><a href="https://www.iucnredlist.org/species/157719927/89815479" target="_blank" rel="noopener noreferrer"><em>Chitala lopis</em></a> </strong>— A large fish from the island of Java, this species hasn't been seen since 1851 (although many online sources use this taxonomic name for other "featherback" fish species that still exist). It was probably wiped out by a wide range of habitat-degrading factors, including pollution, unsustainable fishing and near-complete deforestation around nearby rivers.</p><p><strong><a href="https://www.iucnredlist.org/species/140416686/140416698" target="_blank" rel="noopener noreferrer"><em>Eriocaulon jordanii</em></a> </strong>— This grass species formerly occurred in two known sites in coastal Sierra Leone, where its previous habitats were converted to rice fields in the 1950s.</p><p><a href="https://www.iucnredlist.org/species/152357598/154696297" target="_blank" rel="noopener noreferrer"><em><strong>Amomum sumatranum</strong></em></a> — A relative of cardamom, this plant from Sumatra was only scientifically collected once, back in 1921, and the forest where that sample originated has now been completely developed. The IUCN says one remaining cultivated population exists, so they've declared it "extinct in the wild."</p><p><a href="https://www.iucnredlist.org/species/115696622/115696628" target="_blank" rel="noopener noreferrer"><strong>Lost shark (<em>Carcharhinus obsoletus</em>)</strong></a> — This species makes its second annual appearance on this list. Scientists <a href="https://therevelator.org/lost-shark/" target="_blank" rel="noopener noreferrer">described this species in 2019</a> after examining decades-old specimens, noting that it hadn't been observed since the 1930s. This year the IUCN added the species to the Red List and declared it "critically endangered (possibly extinct)."</p>"Lost shark." Photo: PLOS One
<p><strong><em><a href="https://bioone.org/journals/the-bryologist/volume-123/issue-4/0007-2745-123.4.657/----Custom-HTML----iCora/10.1639/0007-2745-123.4.657.short?tab=ArticleLink" target="_blank" rel="noopener noreferrer">Cora timucua</a></em></strong><strong> </strong>— This lichen from Florida was just identified from historical collections through DNA barcoding. Unfortunately no new samples have been collected since the turn of the 19th century. The scientists who named the species this past December call it "potentially extinct" but suggest it be listed as critically endangered in case it still hangs on in remote parts of the highly developed state. They caution, however, that it hasn't turned up in any recent surveys.</p><p><strong><a href="https://allafrica.com/stories/202004190028.html?fbclid=IwAR33mKWioEaLjHXIBdJqOyB40tp90UA-DEi69IecBTMQ8SQUyt1fEOCGf4g" target="_blank">Dama gazelle (<em>Nanger dama</em>) in Tunisia</a> </strong>— This critically endangered species still hangs on in a few other countries, and in captivity, but the death of the last individual in Tunisia marked one more country in which the gazelle has now been extirpated and serves as a stark reminder to keep the rest from fading away.</p><p><em><a href="https://therevelator.org/author/john/" target="_blank" rel="noopener noreferrer">John R. Platt</a> is the editor of The Revelator. An award-winning environmental journalist, his work has appeared in Scientific American, Audubon, Motherboard, and numerous other magazines and publications. His "Extinction Countdown" column has run continuously since 2004 and has covered news and science related to more than 1,000 endangered species. He is a member of the Society of Environmental Journalists and the National Association of Science Writers. John lives on the outskirts of Portland, Ore., where he finds himself surrounded by animals and cartoonists.</em></p><p><em>Reposted with permission from <a href="https://therevelator.org/species-extinct-2020" target="_blank">The Revelator</a>.</em></p>- 503 New Species Identified in 2020, Including Endangered Monkey ... ›
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