Ringing Auks on the Shiants: Retrapping Adults for Survival

In this article for BTO's RAS News from 2012, Shiant team leader Jim Lennon explains how the group perform standardised ringing of Puffins during each year's two-week visit. This longitudinal study is providing data to compare breeding success and population changes year on year. The group is using BTO's Retrapping Adults for Survival (RAS) method.