Here's a local resident (Chipping Sodbury actually) to go with our recent sound recording (repeated below) of one of his Shire Way cousins, a short distance from Wapley. The sound recording was made at 11.30 pm. Apparently robins can see well enough to catch insects by street lighting, so they stay up late and only shut up when the street lamps go off. A local friend reports that her neighbourhood robin starts singing at 3.00 am, so either they don't need much sleep, or they operate a shift system...
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