Alan Pomroy / March 2020 – vol. 113, issue 3, pp 137–151 Alan PomroyAge and sexFirst-years comprised 81.6% of new birds captured in this study (n=185). Moreno-Opo et al. (2015) found that age ratio differed significantly according to wintering region, with a higher percentage of first-years in the Iberian Peninsula and Morocco (81.3%, n=874) than south of the Sahara (54.7%, n=185).In this study, 199 out of 238 winter birds were sexed by wing l... This article is only available to registered users.To read more, please log in or purchase a subscription.