Wedge-tailed Shearwaters leave Hawaiʻi at the end of the nesting season (November) and return in spring (March - April). During their winter dispersal, shearwaters are threatened by fisheries and marine debris. Yet, we do not know where they go and whether their migrations shift in response to changing ocean conditions. Mapping their year-round distributions and the threats shearwaters face at sea, will facilitate the broader conservation of this species throughout their life cycle.