Acknowledgements

Many thanks to everyone involved in the Baltic Seabird Project, especially those tied to the USV and bird capture work. Especially thank you to Quentin Queiros for feedback on the modelling procedure and manuscript. Field work was supported by WWF Sweden and Milkywire. Jonas Hentati-Sundberg, Olof Olsson and Astrid Carlsen were supported by Marcus and Marianne Wallenbergs stiftelse (grant number 2018-0093). Jonas Hentati-Sundberg was also supported by Vetenskapsrådet (grant number 2021- 03892) and Formas (grant number 2021-02639). Bird handeling permit was granted by Linköpings Djurförsöksetiska Nämnd (dnr 2477-2021).