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The influence of sex and age on success in contests over access to food was studied in a wintering population of snow buntings,Plectrophenax nivalisin northeast Scotland over a 5-year period. Males won 87% of dyadic interactions with females, but, in contrast to many other studies, first-winter birds won a majority (60-70%) of intra-sexual interactions with same-sex adults. First-winter males continued...
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