A new report suggests that while humans continue to build improved communication systems, millions of North American birds are dying due to collisions with radio and television towers.
The joint American-Canadian study said that birds are often attracted to the lights glowing on the giant towers.
The survey indicated that solid red lights attract more birds but blinking red lights are much less risky.
The Canadian Broadcasting Corporation reported that North America's 84,000 communication towers kill nearly seven million birds traversing North America to warmer southern climates. Cloudy weather makes the situation even more dangerous, as birds are forced to fly low and risk running into towers.