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The butterfly has rich orange-brown wings with black veins and a black border adorned with white spots. Its body is black with small white speckles. The background is a lush green.) Jack Cochran The Danaus eresimus, commonly known as the soldier butterfly, is among the 20 butterfly species experiencing the steepest decline Butterfly populations in the US shrank by more than a fifth within the space of two decades, according to a new study. Numbers fell by 22% between 2000 and 2020, according to research by Binghamton University in New York. A third of species saw serious decline, with some, like Julia's Skipper, losing more than 90% of their populations. However, the researchers say butterflies may be able to recover if urgent conservation measures are taken. The study published in the (http://dx.doi.org/10.1126/science.adp4671) journal Science measured butterfly \"abundance\" - the number of individuals of a species within a specific area. It analysed 12.6 million butterfly sightings from 76,000 surveys across 35 monitoring programmes. This included data from citizen science programmes like the North American Butterfly Association's Fourth of July counts. Using statistical models, they estimated population trends for 342 species. The results showed that 33% were in significant decline, with many exhibiting extreme losses - 107 species declined by more than 50%. \"While the results aligned with global trends, seeing the extent of the decline at such a large spatial scale was sobering,\" said Prof Eliza Grames, an assistant professor of biological sciences at Binghamton University. (Randy Bodkins A West Virginia White butterfly is perched on a cluster of small white flowers. The butterfly has delicate, white wings with a faint hint of veins visible. The plant has bright green, serrated leaves and a slender stem. The background is blurred, creating a soft contrast with the sharply focused butterfly and plant.) Randy Bodkins The West Virginia White (Pieris virginiensis) - a woodland butterfly - has declined in abundance by more than 98% Some of the most affected species include the Florida white, Hermes copper, tailed orange, Mitchell's satyr, and West Virginia white, all of which have declined in abundance by more than 98% within the US. The West Coast lady, once a common backyard butterfly, has declined by 80%, raising alarm as even this highly adaptable species struggled. \"That's alarming because it suggests even common butterflies aren't safe,\" Prof Grames said. Habitat loss, pesticides, and climate change are key causes of this decline, according to the researchers. Butterflies are crucial pollinators, supporting plants and crops. Experts say their decline could disrupt food production and entire ecosystems. They also serve as indicators of environmental health - when butterfly numbers fall, it signals trouble for other species. Southwest US most affected Species are declining most severely in the US Southwest, one of the hottest and driest regions, researchers say. They believe drought may be a major contributor to these losses. \"Drought is a double threat - it harms butterflies directly and also affects their food and host plants,\" Prof Grames explained. The results could help drive important conservation efforts, such as prioritising species for the International Union for Conservation of Nature (IUCN) Red List of Threatened Species and Endangered Species Act protection. Despite the decline, there is hope for recovery. \"Butterflies can recover quickly because they have short generation times. Small actions like planting wildflowers, reducing pesticide use, or even leaving part of a backyard unmowed can significantly improve their chances,\" Prof Grames said. She also stressed the need for government action. \"Insects are fundamental to life on earth, and we need conservation actions and policies that support insects.\" (/news/science_and_environment) Science & Environment (/news/topics/c9grgwq2krzt) Biodiversity (/news/topics/cd0dw4xprgyt) Butterflies (/news/topics/cnegp3zl2pyt) Insects (/news/topics/cx1m7zg01xyt) United States Related (/news/articles/c2ern1zjkvyo) Lab-grown food could be sold in UK within two years 23 hrs ago Science & Environment (/news/articles/crew5z55ygjo) Toppled private spacecraft can't complete Moon mission 3 days ago Science & Environment (/news/articles/c871eeez0yzo) Private spacecraft lands on Moon - but may be on its side 4 days ago Science & Environment More (/news/articles/c4gdwy1gjjjo) 50 mins ago (Mahmoud Khalil speaks at a pro-Palestinian protest) US court temporarily blocks effort to deport Gaza protest leader President Trump says more arrests will follow, as protesters demonstrate against the detention of Mahmoud Khalil. 50 mins ago US & Canada (/news/articles/c4gdwgjkk1no) 2 hrs ago (Image shows Donald Trump) US stocks plunge as fears grow over economic slowdown The Nasdaq sinks by 4.0% and there are heavy losses for tech stocks, as President Trump's tariffs fuel fears of a recession. 2 hrs ago US & Canada (/news/articles/c7430kq7eyxo) 3 hrs ago (A hand holds an iPhone displaying the terms and conditions screen of the CBP's app.) US unveils new app for 'self-deportations' The Trump administration has told migrants to leave voluntarily or face harsher consequences. 3 hrs ago US & Canada (/news/articles/cm2yl5kevrpo) 4 hrs ago (Ukranian President Volodymyr Zelensky, US President Donald Trump and Vice-President JD Vance seen seated on chairs in the Oval Office during a heated exchange) JD Vance's cousin criticises him for 'belittling' Zelensky Nate Vance spent three years volunteering with the Ukrainian military after Russia's full-scale invasion. 4 hrs ago US & Canada (/news/articles/cgj5d9jyxwyo) 4 hrs ago (Menendez brothers) Los Angeles prosecutor opposes move to free Menendez brothers The new district attorney's stand could roll back an effort by his predecessor to ease the brothers' punishment for killing their parents. 4 hrs ago US & Canada (/) British Broadcasting Corporation (https://www.bbc.com/) Home (/news) News (/sport) Sport (/business) Business (/innovation) Innovation (/culture) Culture (/arts) Arts (/travel) Travel (/future-planet) Earth (/audio) Audio (/video) Video (/live) Live (https://www.bbc.com/weather) Weather (https://shop.bbc.com/) BBC Shop BBC in other languages Follow BBC on: (https://www.bbc.co.uk/usingthebbc/terms) Terms of Use (https://www.bbc.co.uk/aboutthebbc) About the BBC (https://www.bbc.com/usingthebbc/privacy/) Privacy Policy (https://www.bbc.com/usingthebbc/cookies/) Cookies (https://www.bbc.co.uk/accessibility/) Accessibility Help (https://www.bbc.co.uk/contact) Contact the BBC (https://www.bbc.com/advertisingcontact) Advertise with us (https://www.bbc.com/usingthebbc/cookies/how-can-i-change-my-bbc-cookie-settings/) Do not share or sell my info (https://www.bbc.com/contact-bbc-com-help) Contact technical support Copyright 2025 BBC. 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It analysed 12.6 million butterfly sightings from 76,000 surveys across 35 monitoring programmes.This included data from citizen science programmes like the North American Butterfly Association's Fourth of July counts.Using statistical models, they estimated population trends for 342 species.The results showed that 33% were in significant decline, with many exhibiting extreme losses - 107 species declined by more than 50%.\"While the results aligned with global trends, seeing the extent of the decline at such a large spatial scale was sobering,\" said Prof Eliza Grames, an assistant professor of biological sciences at Binghamton University.Randy BodkinsThe West Virginia White (Pieris virginiensis) - a woodland butterfly - has declined in abundance by more than 98%Some of the most affected species include the Florida white, Hermes copper, tailed orange, Mitchell's satyr, and West Virginia white, all of which have declined in abundance by more than 98% within the US.The West Coast lady, once a common backyard butterfly, has declined by 80%, raising alarm as even this highly adaptable species struggled.\"That's alarming because it suggests even common butterflies aren't safe,\" Prof Grames said.Habitat loss, pesticides, and climate change are key causes of this decline, according to the researchers.Butterflies are crucial pollinators, supporting plants and crops. Experts say their decline could disrupt food production and entire ecosystems.They also serve as indicators of environmental health - when butterfly numbers fall, it signals trouble for other species.Southwest US most affectedSpecies are declining most severely in the US Southwest, one of the hottest and driest regions, researchers say. They believe drought may be a major contributor to these losses.\"Drought is a double threat - it harms butterflies directly and also affects their food and host plants,\" Prof Grames explained.The results could help drive important conservation efforts, such as prioritising species for the International Union for Conservation of Nature (IUCN) Red List of Threatened Species and Endangered Species Act protection.Despite the decline, there is hope for recovery.\"Butterflies can recover quickly because they have short generation times. Small actions like planting wildflowers, reducing pesticide use, or even leaving part of a backyard unmowed can significantly improve their chances,\" Prof Grames said.She also stressed the need for government action.\"Insects are fundamental to life on earth, and we need conservation actions and policies that support insects.\"" ], "output": "readability/", "pwd": "/data/archive/1741651758.639035", "schema": "ArchiveResult", "start_ts": "2025-03-11T00:09:44.873840+00:00", "status": "succeeded" } ], "screenshot": [], "singlefile": [], "title": [ { "cmd": [ "/usr/bin/curl", "--silent", "--location", "--compressed", "--proxy", "socks5://tor-socks-proxy:9150", "--max-time", "60", "--user-agent", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36 ArchiveBox/{VERSION} (+https://github.com/ArchiveBox/ArchiveBox/)", "https://www.bbc.com/news/articles/cwyjkn729gpo" ], "cmd_version": "8.10.1", "end_ts": "2025-03-11T00:09:43.757191+00:00", "index_texts": null, "output": "US butterfly populations drop by 22% in two decades, study says", "pwd": "/data/archive/1741651758.639035", "schema": "ArchiveResult", "start_ts": "2025-03-11T00:09:43.722129+00:00", "status": "succeeded" } ], "wget": [] }, "icons": null, "is_archived": true, "is_static": false, "latest": { "archive_org": "https://web.archive.org/web/20250311001036/https://www.bbc.com/news/articles/cwyjkn729gpo", "dom": "output.html", "favicon": "favicon.ico", "git": null, "media": "ArchiveError: Failed to save media", "pdf": null, "screenshot": null, "singlefile": null, "title": "US butterfly populations drop by 22% in two decades, study says", "warc": null, "wget": null }, "link_dir": "/data/archive/1741651758.639035", "newest_archive_date": "2025-03-11T00:10:28.848523+00:00", "num_failures": 1, "num_outputs": 8, "oldest_archive_date": "2025-03-11T00:09:24.571751+00:00", "path": "/news/articles/cwyjkn729gpo", "schema": "Link", "scheme": "https", "snapshot_abid": "snp_01JP18HKJXB0B9831E010PP2JZ", "snapshot_id": "dc3a4769-07ff-4490-b2be-b530c16b0a5f", "sources": [ "/data/sources/1741651757-import.txt" ], "tags": null, "tags_str": "", "timestamp": "1741651758.639035", "title": "US butterfly populations drop by 22% in two decades, study says", "url": "https://www.bbc.com/news/articles/cwyjkn729gpo" }