White Wagtails subspecies alba pass through Pembrokeshire in both spring (from March to May) and autumn (late August to October), sometimes in considerable numbers, such as 200 at Skokholm on 15 September 1988. Many of these originate in Iceland, judging by ringing recoveries, but it is likely that others are Scandinavian, as their passage coincides with the occurrence of other species from that area, such as Grey-headed Wagtails, Scandinavian Rock Pipits and Bluethroats. Ringing also shows that birds passing through Pembrokeshire journey on to France and Spain on the return migration.