Female adult Common Cuckoos (IMAGE) Advanced Science Research Center, GC/CUNY Caption Female adult Common Cuckoos appear in two color morphs, shown here as half of the rufous (hepatic) form (left) and half of the gray morph (male-like, right). Credit Bianka Regina Jaska Usage Restrictions All rights reserved License Original 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.