User:EliteSpoon/Ecological light pollution

Lights on tall structures can disorient migrating birds leading to fatalities. An estimated 365-988 million fatal bird collisions with buildings occur annually in North America, making human-made structures a large contributor to the decline in bird species.

The surface area of glass emitting artificial light at night is a major factor for fatal bird collisions with buildings. Turning off lights at night can minimize these fatalities.