On Sat, 24 Jan 2009 14:49:34 -0800 (PST), Andrew Stucken
wrote:

I heard a bird singing all night long through the worst of the cold
spell earlier this month. A pigeon I think. Does he know something we
don't?

It's caused by light pollution. Some birds just don't know when it's
night and time to shut up.

Steve

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Neural Planner Software Ltd http://www.NPSL1.com