Current Biology Sept. 19, 2006 cover (IMAGE) Cell Press Caption A mating trio of bluegill sunfish consisting of a parental male (left), a female (center), and a cuckolder male that mimics a female in coloration and behavior. Despite the clever deception of the cuckolder male, a parental male still manages to sire a majority of the eggs within his nests. Consequently, his offspring are highly related to most of the young within the nest, and his offspring do not differentiate among kin and nonkin when associating with nestmates. Conversely, the offspring of cuckolder males are typically unrelated to many of the young within a nest, and unlike the parental male's offspring, cuckolder offspring compare the similarity of a putative kin's odor to their own odor to find nestmates that are kin (this method is referred to as self-referent phenotype matching). For more details, see the article by Hain et al. in Current Biology. Credit Current Biology Usage Restrictions This image may only be used to illustrate a news item about research published in this specific issue. This image may not be altered or cropped without advance permission. If you have questions or concerns, please contact Heidi Hardman at 617-397-2879 or <A HREF="mailto:hhardman@cell.com">hhardman@cell.com</A>. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.