Thanks Alba - I recall a TV programme a few years ago about the deliberate extermination of the Tasmanian tigers. There are occasional reported sightings of them in N.Zealand but no firm evidence of their continued existence so probably just wishful thinking. I know that a lot of animals became extinct before man arrived on the scene, but I really think that we can ill afford to lose any more - I mean, it's not as if new species are evolving to take their places any more.