Nesting Time

When I went to my dentist last week there were two pigeons at the top of the (inside/carpeted) stairs  just minding their own business. Today not only do they have a nest on the top stair, there's an egg too.

Clearly the passing traffic of patients - and the inevitable whine of the drill - doesn't disturb them.

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UPDATE: Back at the dentist, 1st June.  Pigeons and nest have been relocated to a nearby pigeon loft.