![]() Image courtesy of Karen Bean, Field Museum. Selection of birds found at McCormick Place, from the scientific collections of the Field Museum. The factors that had the strongest effect on bird collisions were the intensity of the migration (more birds migrating = more collisions), the wind direction (westerly winds = more collisions), and area of illuminated windows (more surface area lit = more collisions). Our research, published Jin PNAS, found that over the course of 21 years, one building sustained 11 times fewer bird collisions during spring migration and 6 times fewer collisions during fall migration when only half of the building’s windows were illuminated, compared to when all windows were lit. But even if you can’t turn out all the lights in a building, darkening even some windows could be a major lifesaver for birds. Proceedings of the National Academy of Sciencesīuilding lights are a deadly lure for the billions of birds that migrate at night, disrupting their natural navigation cues and leading to deadly collisions. Van Doren BM, Willard DE, Hennen M, Horton KG, Stuber EF, Sheldon D, Sivakumar AH, Wang J, Farnsworth A, Winger BM Drivers of fatal bird collisions in an urban center Lights Out Texas was initiated as a statewide effort in Spring 2020 to protect birds from light pollution by the Cornell Lab of Ornithology and BirdCast, with the essential support of founding Texas partners Houston Audubon, the Dallas Zoo, and the Perot Museum of Nature and Science.
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