Bruce LePard | National Audubon Society A bird strike survey determined that this Galveston building's normal evening illumination (left) posed a danger to migrating birds. Owners agreed to adjust their lighting (right). The Bexar Audubon Society needs volunteers to identify lighted downtown buildings that may be related to fatal bird strikes at night. The activity is part of its "Lights Out Texas" project. Volunteers will fan out across the downtown area from Monday, April 19, through Friday, May 7, to collect data on the varieties and locations of dead and injured birds. Those dates fall within the peak of spring bird migration. Patsy Inglet, the society's president, said the data will be entered into an application called iNaturalist.