In socially monogamous species, pair-bonds may persist over multiple breeding seasons, which can have important fitness consequences. Therefore, partnerships are of fundamental evolutionary importance, yet studies predominantly focus on sexual conflict, making the framework of life-history evolution with regard to partnerships incomplete. Frigg is exploring what defines a strong partnership in Chirruping wedgebills using automated radiotracking and why some partnerships are maintained whereas others are not using long-term data on the Seychelles warbler.