Supplementary video M1 from Method to improve the survival of night-swarming mayflies near bridges in areas of distracting light-pollution EgriÁdám SzázDénes FarkasAlexandra PereszlényiÁdám HorváthGábor KriskaGyörgy 2017 The most significant parts of our experiments recorded during the preliminary test in 2015 at the bridge of Rábahídvég.