Red-footed falcons are social birds, migrating in large flocks from central and eastern Europe to southern and south-western Africa. Six days watching these three resulted in a picture that reveals a subtle interaction: one female nudged the male with her talon as she flew up to make space on the branch for the other female. Exactly what the relationship was between the three birds remains a mystery. (Photo by Amir Ben-Dov/2015 Wildlife Photographer of the Year)
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