Data quantifying the relationship between female mate choice and reproductive success are scarce.
In a Swedish population of pheasants females prefer to mate with long-spurred males. Male viability also correlates with male spur length. DNA-fingerprinting was used to measure individual pheasants' reproductive success in terms of both hatchlings and surviving offspring. The data show that long-spurred males sired more hatchlings and surviving offspring and that also the females' production of number of surviving offspring correlated with their mate's spur length.