The Sydney Harbour Bridge. Photograph taken from Observatory Hill on 25 July 2005. Note the glow in the sky just above the bridge. Within this glow there are some squiggly white lines which were produced by birds flying within the upward shining light beams on this 15 second exposure. These birds are either attracted by the lights or are feeding on insects which have been attracted by the lights. The bridge floodlights are turned off at 1:00am.
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