Strength and cost of an induced immune response are associated with a heritable melanin-based colour trait in female tawny owls.
Gasparini J., Bize P., Piault R., Wakamatsu K., Blount J.D., Ducrest A.L., Roulin A., 2009. Journal of Animal Ecology, 78 (3) pp. 608-616. Peer-reviewed.