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

Planetizen Federal Action Tracker
A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

Chicago’s Ghost Rails
Just beneath the surface of the modern city lie the remnants of its expansive early 20th-century streetcar system.

Amtrak Cutting Jobs, Funding to High-Speed Rail
The agency plans to cut 10 percent of its workforce and has confirmed it will not fund new high-speed rail projects.

Ohio Forces Data Centers to Prepay for Power
Utilities are calling on states to hold data center operators responsible for new energy demands to prevent leaving consumers on the hook for their bills.

MARTA CEO Steps Down Amid Citizenship Concerns
MARTA’s board announced Thursday that its chief, who is from Canada, is resigning due to questions about his immigration status.

Silicon Valley ‘Bike Superhighway’ Awarded $14M State Grant
A Caltrans grant brings the 10-mile Central Bikeway project connecting Santa Clara and East San Jose closer to fruition.
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