Abstract Background The evolutionary interests of males and females rarely coincide (sexual conflict). and these conflicting interests influence morphology. behavior and speciation in various organisms. We examined consequences of variation in sexual conflict in two closely-related passerine birds with contrasting breeding systems: the Eurasian penduline tit Remiz pendulinus (EPT) exh... https://unitedssports.shop/product-category/goalie-goalie-mask-youth/