Breeding status influences timing but not duration of moult in the Northern Fulmar Fulmarus glacialis

We thank Orkney Islands Council for access to Eynhallow and all the fieldworkers involved in deployment and recovery of the GLS tags and colony monitoring. All ringing work was carried out under permit from the BTO. We are grateful to James Fox of Migrate Technologies for recovering data from GLS loggers which would not download, and Richard Phillips and Janet Silk of BAS for advice on GLS analysis. Lucy Quinn was supported by a NERC Studentship and additional funding to support fieldwork was gratefully received from Talisman Energy (UK) Ltd. Additional support for loggers and analysis was provided through the SEATRACK project, which is funded by the Norwegian Ministry of Climate and Environment, the Norwegian Ministry of Foreign Affairs and the Norwegian Oil and Gas Association.