experimental analyses of sexual and natural selection on short tails in a polygynous warbler. | we believe that no experimental study has yet tested darwin's idea that, as well as generating trait elaboration, intersexual selection might sometimes drive sex-biased trait reduction. here we present the results of two experiments exploring the negative relationship between tail length and reproductive success in male golden-headed cisticolas (cisticola exilis). in the first experiment, artificially shortening a male's tail produced a dramatic increase in his reproductive success, measured as ... | 2000 | 10885517 |