Reports the Guardian:
The Federal Aviation Administration said it will change the lighting on towers across the US after its research found that birds are attracted to steady red lights that highlight obstructions to pilots at night. The research found that static red lights attract birds – often in large migratory flocks – which then circle the light repeatedly, often collapsing of exhaustion and dying on the ground. Some birds perish after hitting towers or surrounding wires.
It’s thought that constant red lights disorientate birds far more than blue, white or flashing lights.