Artificial light has essentially lengthened birds' day
Summary
A recent study shows that light pollution extends the active days of birds globally by about 50 minutes on average. Researchers used data from bird calls and light pollution to find that birds start singing earlier and continue later into the evening because of artificial light.Key Facts
- Light pollution causes birds around the world to have longer active days.
- Birds start their daily activities about 20 minutes earlier and end about 30 minutes later.
- The study analyzed bird calls from over 500 species across multiple continents.
- Data was collected using BirdWeather devices, installed by birdwatchers and wildlife enthusiasts.
- The study combined bird activity data with satellite information on light pollution.
- Some birds, like American Robins, respond strongly to light pollution by singing hours before sunrise.
- Birds with larger eyes for their body size were more affected by light pollution.
- Birds that nest in enclosed spaces showed less sensitivity to artificial light.
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