{"page":"\u003clink rel=\"stylesheet\" href=\"https://lessonplanet.com/assets/packs/css/resources-572d6a42.css\" /\u003e\n\u003clink rel=\"stylesheet\" href=\"https://lessonplanet.com/assets/packs/css/lp_boclips_stylesheets-f4d0de30.css\" media=\"all\" /\u003e\n\u003cdiv data-title='How Birds Almost Escalated The Cold War' data-url='/boclips/videos/6185718673d7c3706c221f81' data-video-url='/boclips/videos/6185718673d7c3706c221f81' id='bo_player_modal'\u003e\n\u003cdiv class='boclips-resource-page modal-dialog panel-container'\u003e\n\u003cdiv class='react-notifications-root'\u003e\u003c/div\u003e\n\u003cdiv class='rp-header'\u003e\n\u003cdiv class='rp-type'\u003e\n\u003ci aria-hidden='true' class='fai fa-regular fa-circle-play'\u003e\u003c/i\u003e\nVideo\n\u003c/div\u003e\n\u003ch1 class='rp-title' id='video-title'\u003e\nHow Birds Almost Escalated The Cold War\n\u003c/h1\u003e\n\u003cdiv class='rp-actions'\u003e\n\u003cdiv class='mr-1'\u003e\n\u003ca class=\"btn btn-success\" data-posthog-event=\"Signup: LP Signup Activity\" data-posthog-location=\"body_link_boclips\" data-remote=\"true\" href=\"/subscription/new\"\u003e\u003cspan\u003e\u003cspan\u003eGet Free Access\u003c/span\u003e\u003cspan class=\"\"\u003e for 10 Days\u003c/span\u003e\u003cspan\u003e!\u003c/span\u003e\u003c/span\u003e\u003c/a\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv class='rp-body'\u003e\n\u003cdiv class='rp-info'\u003e\n\u003cdiv aria-label='Hide resource details' class='rp-hide-info' role='button' tabindex='0'\u003e\u0026times;\u003c/div\u003e\n\u003ci aria-label='Expand resource details' class='rp-expand-info fai fa-solid fa-up-right-and-down-left-from-center' role='button' tabindex='0'\u003e\u003c/i\u003e\n\u003ci aria-label='Compress resource details' class='rp-compress-info fai fa-solid fa-down-left-and-up-right-to-center' role='button' tabindex='0'\u003e\u003c/i\u003e\n\u003cdiv class='rp-rating'\u003e\n\u003cspan class='resource-pool'\u003e\n\u003cspan class='pool-label'\u003ePublisher:\u003c/span\u003e\n\u003cspan class='pool-name'\u003e\n\u003cspan class='text'\u003e\u003ca data-publisher-id=\"30358007\" href=\"/search?publisher_ids%5B%5D=30358007\"\u003eMinuteEarth\u003c/a\u003e\u003c/span\u003e\n\u003c/span\u003e\n\u003c/span\u003e\n\u003c/div\u003e\n\u003cdiv class='rp-description'\u003e\n\u003cspan class='short-description'\u003eTo find out how you can help Nature Canada protect at least 30% of the world’s lands and ocean by 2030, visit A technology to ignore birds on radar ended up being useful to study and conserve them. LEARN MORE ************** To learn more...\u003c/span\u003e\n\u003cspan class='full-description hide'\u003eTo find out how you can help Nature Canada protect at least 30% of the world’s lands and ocean by 2030, \u003ca href='https://www.naturecanada.ca/?utm_source=MinuteEarth.' target='_blank' rel='nofollow'\u003evisit\u003c/a\u003e A technology to ignore birds on radar ended up being useful to study and conserve them. LEARN MORE ************** To learn more about this topic, start your googling with these keywords: Radar aeroecology - the use of radar to study airborne life, like birds, bats, and bugs Radar ornithology - the use of radar to study birds, especially bird migration Dual-polarization radar - radar that transmits and receives waves in both a horizontal and vertical orientation, giving a better idea of a target’s size, shape, and variety. Doppler effect - a change in a wave’s frequency in relation to whatever is observing it, such as a radar, but also your ears (it’s the reason a sound like an ambulance siren changes as it gets closer or further away from you). SUPPORT MINUTEEARTH ************************** If you like what we do, you can help us!: - Become our \u003ca href='https://patreon.com/MinuteEarth' target='_blank' rel='nofollow'\u003epatron\u003c/a\u003e - Share this video with your friends and family - Leave us a comment (we read them!) CREDITS ********* Julián Gustavo Gómez (@TheJulianGomez) | Script Writer, Narrator and Director Sarah Berman (@sarahjberman) | Illustration, Video Editing and Animation Aldo de Vos, Know Art | Music MinuteEarth is produced by Neptune Studios \u003ca href='https://neptunestudios.info' target='_blank' rel='nofollow'\u003eLLC\u003c/a\u003e OUR STAFF ************ Sarah Berman • Arcadi Garcia i Rius David Goldenberg • Julián Gustavo Gómez Melissa Hayes • Alex Reich • Henry Reich • Peter Reich Ever Salazar • Leonardo Souza • Kate Yoshida OTHER CREDITS ***************** Radar footage by National Weather Service, BirdCast, and Alex Bencke Swallows footage by Ted Cheskey, Nature Canada OUR LINKS ************ \u003ca href='https://youtube.com/MinuteEarth' target='_blank' rel='nofollow'\u003eYoutube |\u003c/a\u003e \u003ca href='https://tiktok.com/@minuteearth' target='_blank' rel='nofollow'\u003eTikTok |\u003c/a\u003e \u003ca href='https://twitter.com/MinuteEarth' target='_blank' rel='nofollow'\u003eTwitter |\u003c/a\u003e \u003ca href='https://instagram.com/minute_earth' target='_blank' rel='nofollow'\u003eInstagram |\u003c/a\u003e \u003ca href='https://facebook.com/Minuteearth' target='_blank' rel='nofollow'\u003eFacebook |\u003c/a\u003e \u003ca href='https://minuteearth.com' target='_blank' rel='nofollow'\u003eWebsite |\u003c/a\u003e Apple \u003ca href='https://podcasts.apple.com/us/podcast/minuteearth/id649211176' target='_blank' rel='nofollow'\u003ePodcasts|\u003c/a\u003e REFERENCES ************** Bauer, Silke, et al. \"The grand challenges of migration ecology that radar aeroecology can help answer.\" Ecography 42.5 (2019): 861-\u003ca href='https://onlinelibrary.wiley.com/doi/10.1111/ecog.04083' target='_blank' rel='nofollow'\u003e875.\u003c/a\u003e Dokter, Adriaan M., et al. \"Bird migration flight altitudes studied by a network of operational weather radars.\" Journal of the Royal Society Interface 8.54 (2011): 30-\u003ca href='https://royalsocietypublishing.org/doi/10.1098/rsif.2010.0116' target='_blank' rel='nofollow'\u003e43.\u003c/a\u003e Duda, Jeff. \"How to use and interpret Doppler weather radar.\" Retrieved July 18 (2009): \u003ca href='https://meteor.geol.iastate.edu/~jdduda/portfolio/How%20to%20read%20and%20interpret%20weather%20radar.pdf' target='_blank' rel='nofollow'\u003e2014.\u003c/a\u003e Fox, Anthony D., and Patrick DL Beasley. \"David Lack and the birth of radar ornithology.\" Archives of natural history 37.2 (2010): 325-\u003ca href='https://www.euppublishing.com/doi/10.3366/anh.2010.0013' target='_blank' rel='nofollow'\u003e332.\u003c/a\u003e Gauthreaux Jr, Sidney A., and Carroll G. Belser. \"Radar ornithology and biological conservation.\" The Auk 120.2 (2003): 266-\u003ca href='https://www.jstor.org/stable/4090179' target='_blank' rel='nofollow'\u003e277.\u003c/a\u003e Hüppop, Ommo, et al. \"Perspectives and challenges for the use of radar in biological conservation.\" Ecography 42.5 (2019): 912-\u003ca href='https://onlinelibrary.wiley.com/doi/10.1111/ecog.04063' target='_blank' rel='nofollow'\u003e930.\u003c/a\u003e Lack, David, and G. C. Varley. \"Detection of birds by radar.\" Nature 156.3963 (1945): 446-\u003ca href='https://www.nature.com/articles/156446a0' target='_blank' rel='nofollow'\u003e446.\u003c/a\u003e Marshall, S., \u0026 Toma, A. (2012, May 23). The close calls: How false alarms triggered fears of Nuclear War. Council for a Livable World. Retrieved November 2, 2021, \u003ca href='https://livableworld.org/the-close-calls-how-false-alarms-triggered-fears-of-nuclear-war/.' target='_blank' rel='nofollow'\u003efrom\u003c/a\u003e Schuur, T., et al. \"Observations and classification of echoes with the polarimetric WSR-88D radar.\" Report of the National Severe Storms Laboratory, Norman, OK 73069 (2003): \u003ca href='https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.540.9868\u0026rep=rep1\u0026type=pdf' target='_blank' rel='nofollow'\u003e46.\u003c/a\u003e Stepanian, Phillip M., et al. \"Dual‐polarization radar products for biological applications.\" Ecosphere 7.11 (2016): \u003ca href='https://esajournals.onlinelibrary.wiley.com/doi/full/10.1002/ecs2.1539' target='_blank' rel='nofollow'\u003ee01539.\u003c/a\u003e Tang, Lin, et al. \"A physically based precipitation–nonprecipitation radar echo classifier using polarimetric and environmental data in a real-time national system.\" Weather and Forecasting 29.5 (2014): 1106-\u003ca href='https://journals.ametsoc.org/view/journals/wefo/29/5/waf-d-13-00072_1.xml' target='_blank' rel='nofollow'\u003e1119.\u003c/a\u003e Zhang, Pengfei, Shun Liu, and Qin Xu. \"Identifying Doppler velocity contamination caused by migrating birds. 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