Largest-ever analysis raises the possibility of a country without butterflies<\/h2>\n<\/div>\n
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Butterflies are beloved creatures that inspire art and play an important ecological role, but you might have noticed less of them brightening your day in recent years. According to new research featuring faculty at Binghamton University, State University of New York, these cherished insects are disappearing at an alarming rate.<\/p>\n
A new study published in\u00a0Science<\/i>\u00a0examines butterfly data in the United States, and the results are troubling. Looking across 76,000 surveys, the study revealed that butterfly abundance fell by 22% between 2000 and 2020. To put it starkly: for every five butterflies in the U.S. at the turn of the century, there were only four remaining in 2020.<\/p>\n
\u201cThis was the most comprehensive analysis of butterflies in the U.S. and at such a big spatial scale,\u201d said\u00a0Eliza Grames<\/a>, an assistant professor of biological sciences at Binghamton University and co-author of the paper.<\/p>\n Butterflies are the most extensively monitored insect group in the United States, but most monitoring efforts have consisted of volunteer-based and expert science monitoring programs that are limited in geography and have focused on individual species.<\/p>\n This new study funded by the\u00a0U.S. Geological Survey\u00a0<\/a>\u2013 uses all available monitoring data \u2013 35 programs with records of over 12.6 million butterflies \u2013 to provide a clear picture of the state of butterfly species across the continental United States.<\/p>\n The study takes into account the variations in collection protocol and regions to produce comparable results for hundreds of species. Using data integration approaches, the team examined how butterfly abundances changed regionally and individually for the 342 species with enough data.<\/p>\n \u201cAbundance\u201d refers to the total number of individuals of a butterfly species within a given area. During the two-decade period examined, 33% of butterfly species showed significantly declining trends in abundance. Many showed extreme declines in abundance \u2014 107 species declined by more than 50%.<\/p>\n Grames\u2019 role in this nationwide study was to generate range maps for all butterfly species that fed into the analyses. This allowed the team to check whether observations of species were good identifications and should go into the model or if they needed to be checked for data quality cleaning purposes. The team could also see where each of these species could be found within the U.S. and examine spatial patterns.<\/p>\n \u201cWe didn\u2019t have maps for where many of the butterflies were,\u201d said Grames. \u201cHow do we know which records are good? A bunch of them come from\u00a0iNaturalist<\/a>, a citizen science platform where anybody can upload pictures of species. But sometimes people go to a butterfly house and start recording all of these tropical species in, say, Colorado, which throws off the data.\u201d<\/p>\n Part of those conservation efforts includes involving undergraduate students in assessments to gather data and determine how at risk a species might be. In Grames\u2019 Conservation Biology class, students are currently working on IUCN assessments for western skippers, including one of the most declining butterfly species, the Julia\u2019s skipper.<\/p>\n \u201cParticipating in this assessment has allowed me to apply what I\u2019ve learned in class to real-world scenarios,\u201d said Clara Zook, a Binghamton University student working on the assessment for Julia\u2019s skipper with classmate Kieran Buchholz.<\/p>\n \u201cIt\u2019s empowering to know that our research could play a role in preserving this species,\u201d Buchholz said.<\/p>\n In addition to being beautiful and inspiring art, said Grames, butterflies also play a vital role in pollination, helping to pollinate food and flowers and contributing to the health of ecosystems around the world. This study could help drive important conservation efforts, such as prioritizing species for the\u00a0International Union for Conservation of Nature (IUCN) Red List of Threatened Species<\/a>\u00a0and\/or\u00a0Endangered Species Act protection.<\/a><\/p>\n \u201cWe have much better data to go and say, \u2018You know, we should really consider these for federal protection.\u2019 So we can go in, conserve their habitat and \u2013 hopefully \u2013 they can rebound,\u201d said Grames.<\/p>\n Collin Edwards, the study\u2019s lead author, echoed those sentiments. \u201cFor those who were not already aware of insect declines, this should be a wake-up call,\u201d Edwards said. \u201cWe urgently need both local- and national-scale conservation efforts to support butterflies and other insects. We have never had as clear and compelling a picture of butterfly declines as we do now.\u201d<\/p>\n A second project, part of the same USGS group, is looking at the drivers of butterfly loss. A study in the Midwest has pointed to pesticides as a major driver, but there are different drivers across different regions of the U.S. For example, in the Southwest, there are concerns about drought, whereas in the Northeast, it\u2019s more about climate.<\/p>\n Grames said that highlighting what\u2019s happening with butterflies can help to provide a clearer picture of insect population decline overall.<\/p>\n <\/p>\n \u201cInsects are declining at rates of about 1-2% per year, which has come out across several studies,\u201d she said. \u201cThis was another study finding a super similar rate of decline, which really adds evidence to the growing picture of insect declines globally.\u201d<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n <\/p>","protected":false},"excerpt":{"rendered":" Recent research by Binghamton University shows that butterfly populations in the US have dropped by 22% since 2000. Analyzing over 12.6 million records across 342 species, the study highlights declines, urging urgent conservation measures. These declines are driven by factors such as pesticides, climate change, and habitat loss, threatening ecosystems and the beauty of nature.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[8,7,9,6,20],"tags":[],"better_featured_image":null,"_links":{"self":[{"href":"https:\/\/www.e-butterfly.org\/wordpress\/wp-json\/wp\/v2\/posts\/2656"}],"collection":[{"href":"https:\/\/www.e-butterfly.org\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.e-butterfly.org\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.e-butterfly.org\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.e-butterfly.org\/wordpress\/wp-json\/wp\/v2\/comments?post=2656"}],"version-history":[{"count":1,"href":"https:\/\/www.e-butterfly.org\/wordpress\/wp-json\/wp\/v2\/posts\/2656\/revisions"}],"predecessor-version":[{"id":2657,"href":"https:\/\/www.e-butterfly.org\/wordpress\/wp-json\/wp\/v2\/posts\/2656\/revisions\/2657"}],"wp:attachment":[{"href":"https:\/\/www.e-butterfly.org\/wordpress\/wp-json\/wp\/v2\/media?parent=2656"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.e-butterfly.org\/wordpress\/wp-json\/wp\/v2\/categories?post=2656"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.e-butterfly.org\/wordpress\/wp-json\/wp\/v2\/tags?post=2656"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}