Mimetic Eggs (image) University of Illinois at Urbana-Champaign Share Print E-Mail Caption Mimetic eggs of the parasitic common cuckoo differ in size but not in color or shape in the nests of common redstarts in Finland. Credit Photo by Dr. Tomas Grim Usage Restrictions Photo may be used only to illustrate stories about the research described in this release. Credit required. Thanks! Share Print E-Mail 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.