image: Black Gouldian finch family: male, female, and juveniles. This image accompanied the report, "Genetic Incompatibility Drives Sex Allocation and Maternal Investment in a Polymorphic Finch," by S. Pryke et. al. appearing in the March 20, 2009 issue of Science. view more
Credit: Photo by Sarah Pryke, via <i>Science</i>-AAAS