Barber, D & Youngman, R. E / September 1974 – vol. 67, issue 9, pp 392–396 Melanism in shearwaters and auksSince Bryan L. Sage (Brit. Birds, 65: 527) comments on the supposed rarity of melanism in Manx Shearwaters Puffinus puffinus and indeed the Procellariiformes in general, it may be worth pointing out that a dark specimen of the Californian race P.p. opisthomelas was figured by L. M. Loomis on plate 15 of his classic monograph A Review of the Albatrosses, Petrels and ... This article is only available to registered users.To read more, please log in or purchase a subscription.