Trade-offs in the allocation of finite resources among different stages of a breeding attempt as well as between different reproductive events should shape the evolution of life-history traits. To investigate the effects of incubation effort on within-brood and between-brood trade-offs in house...

Female reproductive investment can vary according to their mate's attractiveness, and males may differentially invest according to their own attractiveness. Thus, when studying female parental investment, male investment must also be considered. We tested the hypothesis that the attractiveness...