Since this is a photo post and not an auditory one, you will have to take my word that this simple adjustment in brickwork is music to my ears.
The melodies are not made with the wind blowing past the holes but by ebullient House Sparrows, utilising these mini entrances for their own social housing. Thus with the frequent placements of such bricks all along their structures, the Peabody Buildings of Drury Lane are aptly restoring wildlife from here to Wild Lane. [Listen out too at the top of Long Acre, Covent Garden where the Marks and Spencer building has slatted bricks with huddles of Sparrows peeping and cheeping out of them.]
The once ubiquitous urban Sparrow has declined to such low levels that the Latin name Passer domesticus almost sounds like a self-fulfilling prophecy:-Central London, along with the urban cores of Edinburgh and Glasgow, appears to be reporting near local extinction (RSPB 2012). In 2002, in the midst of this documentation of its disappearance, therefore, the house sparrow made its way onto the UK Red List. (in the absence of Sparrows)
I’ve lived in London’s West end for 20 years and these relatively recent sightings and soundings of the iconic ‘Cockney Sparrer’ add a note of optimism to the WordPress weekly photo challenge: Forward
See also London House Sparrow Parks Project