%0 Journal Article %T Pre- and post-copulatory traits working in concert: sexual dichromatism in passerines is associated with sperm morphology %A Kate L. Durrant %A Matthew R. E. Symonds %A Tom Reader %J - %D 2020 %R 10.1098/rsbl.2019.0568 %X Passerine birds produce costly traits under intense sexual selection, including elaborate sexually dichromatic plumage and sperm morphologies, to compete for fertilizations. Plumage and sperm trait.. %U https://royalsocietypublishing.org/doi/10.1098/rsbl.2019.0568