Jailbirds help sparrows find haven / The Times, 17 December 2007
http://www.timesonline.co.uk/tol/news/uk/article3059891.ece
Lewis Smith
"Prisoners are helping house sparrows to live behind bars to try to slow their decline. A colony of Passer domesticus has found sanctuary with three endangered lowland gorillas at London Zoo. Ten nesting boxes are being built for the birds at Spring Hill Prison near Aylesbury in time for the spring."