In October 2023, a single glass façade in Chicago was found covered with nearly a thousand small lifeless bodies by early morning, according to a report. This event, confirmed as a real occurrence, brings attention to the growing problem of light pollution and its devastating impact on migratory birds. Each year, billions of birds travel across North America at night, using the stars and the Earth's magnetic field to navigate. However, in urban areas, artificial lights can disrupt this natural navigation system, causing birds to become disoriented and fly at low altitudes, where they are more likely to collide with buildings. Migratory birds rely on an intricate sense of direction, reading the night sky like a map and using the Earth's magnetic field to guide them. This system has evolved over millions of years and works well in natural environments. However, in modern cities, the glow from skyscrapers and other structures creates light halos that can outshine the stars, confusing the birds. Once disoriented, they often descend to lower altitudes, where glass buildings pose a particular danger. Glass façades reflect the sky and surrounding greenery or become transparent when lit from the inside. For a flying bird, it can be nearly impossible to distinguish a glass wall from open space, leading to fatal collisions. The Chicago incident was exacerbated by unusual weather conditions that caused an exceptionally high number of birds to fly at low altitudes, encountering a particularly bright building. These types of collisions are not isolated; it is estimated that up to a billion birds die each year in the United States due to similar circumstances. In response to this issue, several North American cities have started to reduce their nighttime lighting during peak migration periods, a strategy that has shown positive results. Programs encourage building managers to dim or turn off lights on upper floors during the night, especially when migration is detected by weather radars. Other solutions include applying patterns to windows to make them visible to birds or using lighting systems that are less disruptive. However, these measures are still limited in scope, often relying on the voluntary cooperation of building owners rather than mandatory regulations. The challenge of creating cities that are safe for wildlife remains significant, requiring a balance between urban development and the needs of the natural world.