The River Sherbourne runs within a large culvert from west to east for about 1.25 miles under Coventry.
Approximately half way along the culvert is a brief open air section of about 30 metres or so. At this point just inside the eastern part of the culvert are the Angry Birds - a flock of pigeons that live in and upon pipes in the wall and fly at you when you're least expecting it!
There were also numerous rats of different sizes which displayed very agile cable climbing techniques.
Pictures are in order of infall to outfall.
