City Lights Make Birds Sing at Night

 
Friday's Urban Legend: PROBABLY FALSE

BBC News reports that "Robins in urban areas are singing at night because it is too noisy during the day, researchers suggest" [City birds sing for silent nights].

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 findings are published in the Royal Society journal Biology Letters.

It turns out that it's not because of night lights that the birds are singing. It's because they can't make themselves heard over the din of city traffic so they wait 'till the dead of night to start singing. That way they get to annoy everyone around them.

I wonder if that's why people talk on cell phones when they're sitting on a quiet commuter train?