July 2018 – vol. 111, issue 7, pp 395–401 By Mark Lewis, Alex Penn and Martin Collinson Abstract A notable gathering of wintering Common Chiffchaffs Phylloscopus collybita at Nigg Bay, North-east Scotland, forms the basis of this short paper. In addition to field observations, six of the seven birds were trapped and ringed, which facilitated sound recordings and/or genetic analysis of these individuals. A close examination of plumage chara... This article is only available to registered users.To read more, please log in or purchase a subscription.