Kingston graduate designs a cavity brick that allows endangered birds to nest in new buildings and garden walls.

The U.K. sparrow population has dropped as much as 70 percent in the past three decades. Urbanization is taking away their nesting sites and the insects they feed upon. The Royal Society of Bird Protection believers their survival depends on urgent action. Aaron Dunkerton is a 22-year old Kingston University graduate who designed the Bird Brick for the conservation of House Sparrows which consists of a five-piece hand-made cavity nesting box.

Bird Brick provides a nesting site for sparrows, in the form of hand-made, clamp-fired bricks. These are installed, in clusters of two or three, into new buildings or garden walls to suit communal nesting habits. As Dunkerton commented on his website:

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