July 1959 – vol. 52, issue 7–215 IT IS NOW generally accepted that the American waders which occur each autumn in western Europe have crossed the Atlantic unaided, in many (if not most) cases without stopping on the way. Yet we are far from being able to answer all the questions which are posed by these remarkable long-distance flights. W h y , for example, do some species cross the Atlantic much more frequently than others? W h ... This article is only available to registered users.To read more, please log in or purchase a subscription.