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Message: <blockquote data-quote="Stephen Menzie" data-source="post: 1297777" data-attributes="member: 43012">The newly described species differs significantly in several physical features including degree of fork in tail, width of white band on the rump, time of moult, body weight and relative wing size - many of these features differ to the degree that, given good views and experience of the species, identification of a bird at sea should be possible!  The two species also differ radically in vocalisation.  Isotope analysis of feathers suggest there is a year-round difference in diet.  Genetic differences and genetic isolation show that there is no "cross breeding" between this and other populations of "Madeiran Storm-petrel".Perhaps it would be wise to read some of the literature on the subject before you relegate these species to the wastebin!</blockquote>