Acknowledgements
Thanks to Patrick Manley, Damien Haberlin, Dave Boyle, Ben Dean, and
Holly Kirk for field assistance. Fergus McCormick and the Office of
Public Works facilitated fieldwork on Skellig Michael, and Chris Taylor
and the Wildlife Trust for South and West Wales facilitated work on
Skomer. The SEATRACK programme provided numerous tracking devices, as
well as curating and processing data from Skellig Michael. Thanks to
Debra Dial of the National Aquarium, USA, Meret Huwiler of TierPark
Bern, Switzerland, and Ana Fereira and Irene Sempere of Oceanário de
Lisboa, Portugal, for insights into the behaviour and phenology of
captive puffins. JD was funded by the Irish Research Council as an
Enterprise Partnership Grant, cofounded by the Petroleum Infrastructure
Program (EPSPG/2019/469). Work on Skomer was supported by the Mary
Griffiths award. The authors declare no conflict of interest.