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Résumé :
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Details are presented of the first temperate North Atlantic sighting, in 1974, of a 'Soft-plumaged Petrel' (i.e. Madeira Petrel Pterodroma madeira or Cape Verde Petrel P. feae). The difficulties and problems encountered at the time through lack of knowledge of the species are discussed, as are data on specimens at the Natural History Museum, Tring. Changes in taxonomic thinking and the consequent improvement in knowledge and field identification are outlined chronologically. A possible mechanism by which seabirds cross the North Atlantic is discussed, and preliminary conclusions regarding the increased number of sightings of 'Soft-plumaged Petrels' are made. The Irish Rare Birds Committee also comments on its initial appraisal and subsequent reassessment of this record.
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