This column will undoubtedly make me very unpopular with some readers and very popular with others, but as a responsible wildlife biologist with a love for birds (and for cats too!), I simply cannot ignore it. I have actually written a whole book on the subject, but no publisher to date will touch it for fear of angering both cat-lovers and bird-lovers. Two years ago, scientists from the Smithsonian Conservation Biology Institute and the U.S. Fish and Wildlife Service estimat