Animals, Birds, Conservation Solutions, Human-wildlife Conflict, Migration, Technology, Wildlife, Wildtech Article published by Sue Palminteri A test of a new system deploying ultraviolet (UV) lights on power lines greatly reduced potentially deadly collisions with the lines by migrating sandhill cranes.Developers of the Avian Collision Avoidance System, or ACAS, randomly assigned the system to be on or off each night of a four-month testing period.Turning on the lighting system reduced crane collisions by 98 percent and enabled crane flocks to more quickly and calmly avoid the power lines while in flight.Many birds can detect UV light, though humans cannot, so the system has potential to reduce a major threat to a range of migratory species without affecting the visibility of structures to humans. Cranes are celebrated for their large size, beauty, unique courtship dancing, and extensive annual migrations.Sandhill cranes (Antigone canadensis), for example, migrate north each year from wintering grounds in Mexico and the southwestern United States to breeding sites across Canada, the northern U.S., and eastern Siberia. Along the way, they stop to rest and refuel at various wetlands and river basins of the western and midwestern U.S.Stopover points are essential to the birds’ migrations and subsequent breeding periods. Although the loss of wetland habitats at stopover and breeding sites is the main threat to sandhills and other cranes, midflight collisions with power lines during migration affect 12 of the world’s 15 crane species, including sandhills.Every year, hundreds of thousands of sandhill cranes congregate on the Platte River in Nebraska during their spring migration, forming large flocks that use the river’s sandbars as a nighttime refuge before dispersing to local fields to feed during the day. Image courtesy of Larry Crist/USFWS.Electric utility companies mark power lines with glow-in-the-dark line markers to try to mitigate the problem. These attempts to make power lines more visible to these large birds have been only partially successful, however, as most collisions occur at night, when the power lines are least visible to birds.A new approach considers bird visionA team of engineering consultants at EDM International has developed a new system that shines near-ultraviolet (UV) lights on power lines, as many bird species are sensitive to UV frequencies. The team tested its system, which it calls the Avian Collision Avoidance System, or ACAS, at a major migratory stopover site for many thousands of sandhill cranes.Hundreds of sandhill cranes die each year by colliding with the power lines at their testing site, the Iain Nicholson Audubon Center at Rowe Sanctuary in Nebraska’s Central Platte River Valley, despite the lines having previously been marked with line markers.Use of the new system substantially reduced the number of collisions between the cranes and a power line that crosses the Central Platte River. The team published its findings and system designs earlier this year with the hopes of advancing a solution to the conflict between human structures and migratory wildlife.In searching for a better way to reduce bird-power line collisions, lead author James Dwyer and colleagues learned that many groups of birds are sensitive to energy wavelengths shorter than what humans can detect, which is roughly 400 nanometers (nm). They developed the ACAS using near-ultraviolet wavelengths of 320 to 400 nm to make the power lines more visible to the cranes without increasing their visibility to people.A power line lit up by near-ultraviolet lights mounted on the line’s supporting structures. Many bird species are sensitive to UV wavelengths, suggesting that the Avian Collision Avoidance System UV lights can help birds see human structures at night. Image courtesy of James F. Dwyer/EDM International, Inc.The system design mounts the UV lights on the supporting structures of a problematic power line and shines the lights on the line itself.“The lights go on the existing tower that holds up the power line,” Dwyer told Mongabay. “Ideally they go on the crossarm or lattice arm that supports the wires.”The construction they tested consisted of four low-wattage UV-A lights, powered by two solar panels and storage batteries, a control box, cables connecting the various components, and a remote control. The authors estimated their total cost came to roughly $6,000, including some UV lights they tested but didn’t deploy in their final version.The ACAS setup on a power line over the Central Platte River in Nebraska. Solar panels and batteries power the system, lights mounted on the posts light up the lines that cross the river. Image courtesy of James F. Dwyer/EDM International, Inc.They tested the ACAS between February and June of 2018, the period when migrating sandhill cranes were in the area. The team randomly assigned the system to be on or off each night, and, from a blind, they watched the behavior of flocks of cranes flying along the river for about five hours on test nights, from dusk to four and a half hours after sunset.They recorded any collisions with the approximately 15-meter-high (50-foot) power line, the birds’ flight behavior after a collision, and their reactions as they approached the power line. The observers also estimated the perpendicular distances with which cranes flying up the river reacted to the power line, with reactions within 25 meters (80 feet) of the line considered risky or dangerous.The observers considered reactions that resulted in the cranes passing over the power line at heights less than 25 meters as “dangerous” flights, even if no collision occurred.A surprisingly strong resultDuring the four-month study, they recorded 916 flocks of cranes passing the power lines and 49 collisions, only one of which occurred when the ACAS system was on. In addition to this 98 percent reduction in collisions, they also documented 82 percent fewer dangerous flights and quicker, more controlled reactions by the cranes to avoid hitting the power lines when the system was on.Hundreds of thousands of sandhill cranes stop along the Platte River in the midwestern U.S. to rest and refuel on their annual migrations. They often travel at night, so the ACAS system’s aim is to help cranes and other birds see power lines and other human structures in the dark, enabling them to safely reach their destinations. Image courtesy of James F. Dwyer/EDM International, Inc.“We think the birds could clearly see the line in the dark even though it was still invisible to us,” Dwyer said.In a statement, Dwyer said he was surprised at the strength of the findings. “I thought perhaps there could be a more effective approach” to reducing collisions, he said. “I thought it would have some effect, but I didn’t dare think the ACAS would pretty much solve the sandhill crane collision problem at our study site on our first try.”A greater sandhill crane reacts to a bald eagle approaching the crane’s chick hidden nearby. Sandhill cranes are large and will aggressively defend their young from potential predators. Image courtesy of Tom Koerner/USFWS.The ACAS developers want to expand their project to other locations and species. “Installation and monitoring is 100% replicable,” Dwyer said. “We need to do more studies with other species, habitats, line configurations, etc., to see if the results are replicable.“We are very interested in collaborating at other sites to conduct additional testing,” he added.The authors suggest in their paper that UV lights could also help to reduce collisions of large migratory birds with wind turbines, as well as keep smaller migrants far from buildings, towers, and other structures that become deadly at night. As power lines and wind turbines proliferate, the authors propose testing various configurations of lights to illuminate the most problematic parts of structures and to be sure the lights don’t affect behavior of insects or other wildlife.Citation:Dwyer, J. F., Pandey, A. K., McHale, L. A., & Harness, R. E. (2019). Near-ultraviolet light reduced sandhill crane collisions with a power line by 98%. The Condor: Ornithological Applications, 121(2). doi:10.1093/condor/duz008FEEDBACK: Use this form to send a message to the editor of this post. If you want to post a public comment, you can do that at the bottom of the page. Popular in the CommunitySponsoredSponsoredOrangutan found tortured and decapitated prompts Indonesia probeEMGIES17 Jan, 2018We will never know the full extent of what this poor Orangutan went through before he died, the same must be done to this evil perpetrator(s) they don’t deserve the air that they breathe this has truly upset me and I wonder for the future for these wonderful creatures. So called ‘Mankind’ has a lot to answer for we are the only ones ruining this world I prefer animals to humans any day of the week.What makes community ecotourism succeed? In Madagascar, location, location, locationScissors1dOther countries should also learn and try to incorporateWhy you should care about the current wave of mass extinctions (commentary)Processor1 DecAfter all, there is no infinite anything in the whole galaxy!Infinite stupidity, right here on earth.The wildlife trade threatens people and animals alike (commentary)Anchor3dUnfortunately I feel The Chinese have no compassion for any living animal. They are a cruel country that as we knowneatbeverything that moves and do not humanily kill these poor animals and insects. They have no health and safety on their markets and they then contract these diseases. Maybe its karma maybe they should look at the way they live and stop using animals for all there so called remedies. DisgustingConservationists welcome China’s wildlife trade banThobolo27 JanChina has consistently been the worlds worst, “ Face of Evil “ in regards our planets flora and fauna survival. In some ways, this is nature trying to fight back. This ban is great, but the rest of the world just cannot allow it to be temporary, because history has demonstrated that once this coronavirus passes, they will in all likelihood, simply revert to been the planets worst Ecco Terrorists. Let’s simply not allow this to happen! How and why they have been able to degrade this planets iconic species, rape the planets rivers, oceans and forests, with apparent impunity, is just mind boggling! Please no more.Probing rural poachers in Africa: Why do they poach?Carrot3dOne day I feel like animals will be more scarce, and I agree with one of my friends, they said that poaching will take over the world, but I also hope notUpset about Amazon fires last year? Focus on deforestation this year (commentary)Bullhorn4dLies and more leisSponsoredSponsoredCoke is again the biggest culprit behind plastic waste in the PhilippinesGrapes7 NovOnce again the article blames companies for the actions of individuals. It is individuals that buy these products, it is individuals that dispose of them improperly. If we want to change it, we have to change, not just create bad guys to blame.Brazilian response to Bolsonaro policies and Amazon fires growsCar4 SepThank you for this excellent report. I feel overwhelmed by the ecocidal intent of the Bolsonaro government in the name of ‘developing’ their ‘God-given’ resources.U.S. allocates first of $30M in grants for forest conservation in SumatraPlanet4dcarrot hella thick ;)Melting Arctic sea ice may be altering winds, weather at equator: studyleftylarry30 JanThe Arctic sea ice seems to be recovering this winter as per the last 10-12 years, good news.Malaysia has the world’s highest deforestation rate, reveals Google forest mapBone27 Sep, 2018Who you’re trying to fool with selective data revelation?You can’t hide the truth if you show historical deforestation for all countries, especially in Europe from 1800s to this day. WorldBank has a good wholesome data on this.Mass tree planting along India’s Cauvery River has scientists worriedSurendra Nekkanti23 JanHi Mongabay. Good effort trying to be objective in this article. I would like to give a constructive feedback which could help in clearing things up.1. It is mentioned that planting trees in village common lands will have negative affects socially and ecologically. There is no need to even have to agree or disagree with it, because, you also mentioned the fact that Cauvery Calling aims to plant trees only in the private lands of the farmers. So, plantation in the common lands doesn’t come into the picture.2.I don’t see that the ecologists are totally against this project, but just they they have some concerns, mainly in terms of what species of trees will be planted. And because there was no direct communication between the ecologists and Isha Foundation, it was not possible for them to address the concerns. As you seem to have spoken with an Isha spokesperson, if you could connect the concerned parties, it would be great, because I see that the ecologists are genuinely interested in making sure things are done the right way.May we all come together and make things happen.Rare Amazon bush dogs caught on camera in BoliviaCarrot1 Feba very good iniciative to be fallowed by the ranchers all overSponsored
Dear Editor,The Guyana Post Office Corporation (GPOC) wishes to acknowledge Mr Roshan Khan’s (Sr) letter published in the newspaper and captioned, “GPOC needs tweaking to remain relevant”. GPOC wishes to apologise to the customer for the inconvenience caused.Further, while efforts are being made to modernise the Post Office, the general public is hereby advised that the following documents are required when sending a parcel via the Post Office:1. Proof of address: This is any mail addressed and delivered to you by the Post Office within the last three months. It should reflect the date stamp of the delivery Post Office and,2. Valid identification – This may be your National Identification Card, the New Driver’s Licence or your passport.For further information customers are kindly asked to contact GPOC’s Customer Services Department on telephone number 226-3127 or email us at email@example.com .Yours sincerely,ManagementGuyana Post OfficeCorporation
The Monrovia Consolidated School System (MCSS) has disclosed a plan to focus on a school feeding program in the coming academic year as a means of attracting more students and keeping them in school.MCSS Superintendent, Benjamin Adolphus Jacobs, made the disclosure on Thursday at the Ministry of Information, Cultural Affairs and Tourism (MICAT) regular Ebola Hour press briefing.According to him, MCSS will prioritize the school feeding program to help increase students attendance at school.“The school-feeding program in the upcoming year,” he said, “will to help boost the reflection of learning for the children at the various MCSS campuses as well as increase enrollment.”“No one can learn on an empty stomach, especially the little ones. Many of them will come to school in the morning hungry and weak and cannot respond to their teachers, even at question time. Many of them will not ask questions and sometimes leave campus during recess and run home because of food, Mr. Jacobs stressed.He explained that, many of the school going children were appearing in the classroom without eating anything at home, which he said was causing serious problems in keeping them focused on learning.The MCSS Superintendent further explained that, “due to the fight against the deadly Ebola virus and the issue of breaking the transmission, his administration is hoping to run three shifts, morning, evening and night, as a mean of reducing over crowdedness in the classroom.“We will also have Thermometers testing students and teachers on campus.”He continued, “We are securing vehicles for the three region, Central Monrovia, Sinkor and Bushrod Island, to help in carrying any sick person, both teachers and students, for treatment. “We will have one room reserved on each campus to have the person there before hospital attention is provided.”According to him, they will conduct workshops for teachers and students before the official opening of school and will also observe all Ebola preventive measures on campuses and will have rooms reserved for any outbreak of the disease. He further explained, “We are training guidance counselors for most of our schools that will help to guide many of our students in their learning process. We are also hoping to construct hand-pumps on some of our campuses as a way of improving sanitation.The MCSS Superintendent also disclosed that the counselors will be helping students who are not academically sound and will be guiding them and making sure that such students attend vocational institutions.He disclosed that schools might open in late January or February and close in the late August or September. “We are also working on classes running from Monday to Saturday if all goes well and the Ministry of Education will come up with a position. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)
Sue Anaya’s intricate beadwork “is an ongoing experiment in understanding the languageof color and images that encompass the essence of a particular moment, emotion, or story”.Sue works as an archivist for the Cosanti Foundation. June 7, 2001GalleryResident artists Val Kiri (left) and Sue Anaya (right) were chosen by Paolo Solerito display and sell their crafts for a year in the Arcosanti Gallery.[Photos and text by Jennifer Thornton] According to Val Kiri, her ceramics are “a celebration of relationships and creativity”. Val Kirihas been doing tilework for Cosanti Originals for three years, and privately for two.