Data used in the meta-analysis

EPY %: Proportion of extra-pair young among all young in the given population. Male trait category: “meaningful” refers to traits with previously shown intra- or intersexual role, while “other” refers to traits for which such role has not been confirmed. Effect sizes for the relationship between male traits and brood sex ratio were calculated from published/provided Chi2, ∆D, F and t values.EPY %：特定种群内所有子代中额外配对子代（extra-pair young, EPY）的占比。雄性性状类别：“有明确功能”指此前已被证实存在性内或性间选择作用的性状，“其他”则指尚未确认具备此类作用的性状。雄性性状与窝性比之间关联的效应量，均通过已发表或提供的卡方（Chi2）、∆D、F以及t值计算得到。