At last someone tells it like it is:
BBC: Bid to save sparrows launched
Bird-lovers are being urged to help save the house sparrow, whose numbers have suffered a mysterious decline. The government minister leading the campaign to boost the sparrow population has blamed their disappearance on "trendy gardens" and an explosion in the number of pet cats.
Cat populations are being sustained at unnaturally high levels by selfish people who think Tiddles can do no harm.
String them up is what I say (the cats or their owners, I really don't mind which).