The two outlying Orkney islets north of Cape Wrath usually known to ornithologists as Sule Skerry and Sule Stack, and on charts as Sule Skerry and Stack Skerry (Brit. Birds 100: 300–­304), present problems of nomenclature. Until recently, `Solan Geese' (Northern Gannets Morus bassanus) have been known to breed on just the Stack; while Stack Skerry is a contradiction in terms, since stacks are no


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