High daytime noise levels in urban areas have caused birds to sing at night to avoid the competition. This goes against the previous thought that streetlights were confusing birds into thinking it was day.
"Scientists from the University of Sheffield say there is a link between an area's daytime noise levels and the number of birds singing at night."
"Until now, light pollution had been blamed because it was thought that street lights tricked the birds into thinking it was still daytime."
"'The birds appear to be singing at night to avoid competition with high noise levels caused by our cities during the day,' Dr Fuller suggested."
"'Noise levels were 10 times higher in places where birds were singing at night.'"
FULL STORY: City birds sing for silent nights
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Urban Design for Planners 1: Software Tools
This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.
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Appalachian Highlands Housing Partners
Gallatin County Department of Planning & Community Development
Heyer Gruel & Associates PA
Mpact (founded as Rail~Volution)
City of Camden Redevelopment Agency
City of Astoria
City of Portland
City of Laramie