Dear Andy;- Species wont go away just because we want it to. The best I can come up with is the description by Roger Dunn: Species is "---a kind of life that can have grandchildren. For example, the horse is a species because it can breed with its kind and have little horses. And these can have more horses. The horse can also breed with an ass, but the result---a mule-- is only a hybrid and not a species. It can have children rarely and grandchildren never." Art