Figure 1: The extent of seabird migrations and the biologging data available. 1a) The migration of the sooty shearwater, the longest migration of any species (Figure taken from 2). 1b) The migration and sabbatical year behaviour of a wandering albatross, which circumnavigates the globe twice (Figure taken from ,36). 1c) The global seabird tracking database, containing over 5 million data points (Birdlife.org,
Seabirdtracking.org).