COLUMBIA, Pa. - Video captured on June 22 shows a massive pile of thousands of dead mayflies on a bridge in Columbia, Pennsylvania.
Tom Johnson-Medland shared video of the giant mound of dead mayflies which had appeared to hatch overnight before dying on the Veterans Memorial Bridge which spans the Susquehanna River and connects Columbia to Wrightsville, Pennsylvania.
Johnson-Medland estimated that the largest pile was more than 3 feet high at its highest point.Freeze frame of video that captured pile of dead mayflies on a Pennsylvania bridge. RELATED: ‘Extraordinary’: Video shows octopus pushing pipe with eggs inside back towards ocean Mayflies start their lives in water and once they hatch, they spend about a year as larvae before turning.