early moulting strategy (IMAGE) The University of Hong Kong Caption Remnants of feather sheaths on the wings of the fossil bird Archaeopteryx, shows the earliest evidence of a complex moulting strategy. The white arrows indicate the feather sheaths. Scale bar is 1 cm. Credit Kaye et al. 2020 Usage Restrictions None 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.