We evaluated the degree of sexual segregation (SS) in the feeding ecology, in the choice of main non-breeding areas, in behaviour and in migratory phenology of three closely related shearwaters: Scopoli’s, Cory’s and Cape Verde shearwaters (Calonectris diomedea, C. borealis and C. edwardsii, respectively) during the non-breeding period in relation to the conditions of their different life strategies. The main objective of the study is to better understand the ecological and evolutionary role of sex on the spatial, behavioural and feeding ecology of birds during the non-breeding period, since most studies on birds have focused on the breeding period. The referred issues were addressed through a multidisciplinary approach combining geolocation and stable isotope data.

Las colonias de cría de las aves estudiadas en el artículo son en España (Pantaleu islet, Balearic Islands; Montaña Clara, Canary Islands; Veneguera, Canary Islands), Portugal (Vila islet, Azores Islands) y Cabo Verde (Curral Velho islet).

Data: Stable isotope values of the 13th secondary feather as a proxy of trophic level and diet; Geolocation-immersion loggers data to infer spatio-temporal distribution and migratory phenology.