Risks to different populations and age classes of gannets from impacts of offshore wind farms in the southern North Sea

The southern North Sea holds the world's highest concentration of offshore wind farms (OWFs). Northern gannets (Morus bassanus), a species considered at high risk from OWF impacts, show strong seasonal peak there in November, but it is unclear which populations and age classes are most collision with turbines. We tagged adult juvenile largest colony (Bass Rock) reviewed two sources survey data for different to study their movements through waters. Tracked birds showed numbers mid-October, much smaller during November. Adults were distributed throughout area, including waters close OWFs, whereas juveniles confined coast. Survey indicated proportions immature waters, suggesting higher than adults. Gannets present November may be predominantly colonies further north Bass Rock.