Sex-Related Differences in Foraging Behaviour of Curlew Sandpipers

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Abstract
Differences in foraging behavior and spatial distribution of male and female curlew sandpipers are described. Males and females occurred more often in segregated than in mixed groups, and agonistic behavior was more frequent in single-sex than in mixed groups. Females foraged faster than males and achieed a higher success rate. Competition on the breeding grounds rather than on the wintering grounds may favor sexual dimorphism in the species, since food does not appear to be limiting in southern Africa.