Just one building can cause major problems for birds in the area within one week in 2017, nearly 400 passerines (warblers, grosbeaks, etc.) were caught in the floodlights of a 32-story Texas skyscraper and killed via window collisions. For essential lights (like security lighting) use the following dark skies friendly lighting practices: Aim lights down. Do not use landscape lighting to light up trees or gardens where birds may be resting. The exhaustion can then leave them vulnerable to other urban threats.ĭozens of species are affected, including priority species-those we have identified as most in need of and most likely to benefit from our help- such as the Allen’s Hummingbird, Wood Thrush, and Golden-winged Warbler. Guidelines for Everyone: Turn off all non-essential lights from 11:00 p.m. While lights can throw birds off their migration paths, bird fatalities are more directly caused by the amount of energy the birds waste flying around and calling out in confusion. However, as they pass over big cities on their way, they can become disoriented by bright artificial lights and skyglow, often causing them to collide with buildings or windows. There is a growing effort to help these birds by taking a simple action turning off unnecessary lighting through November 30. Every year, billions of birds migrate north in the spring and south in the fall, the majority of them flying at night, navigating with the night sky.

Download lights out bird migration