In this study, 54 years (1955–2008) of consecutive trappingdata from Ottenby Bird Observatory on the islandof Öland, SE Sweden, was used to analyze the springpassage of the Scandinavian subspecies of the BluethroatLuscinia svecica svecica. The aim was to investigatetrends in the numbers of Bluethroat passing this site andto provide statistics related to the phenology of migration.Trapping of Bluethroats at Ottenby may be seen asan index of population numbers in the recruitment area,especially for the latest decades when trapping conditionshave been standardized. The number of trapped individualswas stable both in the long and short term, butmedian spring passage has become significantly earlierover the study period. The spring migration of the speciesshowed clear age and sex related differences in timing.Male Bluethroats preceded females with about threedays, and adult birds preceded juveniles of both sexes.Finally, the local weather during the peak passage significantlyaffected the number of trapped individuals, withthe largest number trapped in days with head winds fromthe northwest sector.