August 1997 – vol. 90, issue 8, pp 339–342 These comments are supported by personal at-sea experience with all species under consideration, albeit some more familiar to me than others (e.g. thousands of Black and Markham's Storm-petrels, as against only one Tristram's and about 20-30 Matsudaira's Storm-petrels, were seen during a recent research cruise in the western Indian Ocean). It should be kept in mind that these are personal impressions... This article is only available to registered users.To read more, please log in or purchase a subscription.