Black Grouse (Tetrao tetrix) Science Article 7
Recent progress in techniques of quantifying betweenindividualdifferences of color-based ornaments has revealed undiscoveredpossibilities for research in sexual selection. We present howthe color spectra data can be comprehensively used for studying theimportance of sexual ornaments in the black grouse and how theseornaments are related to a male condition.
Heli Siitari et al, Am. Nat. 2007. Vol. 169