Bird Cranial and Beak Bones (IMAGE) Science China Press Caption These are SEM images of the cranial bone and beak bone of the great spotted woodpecker and the lark Cranial bone of (a) woodpecker and (b) lark; beak of (c) woodpecker and (d) lark. Credit © Science China Press 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.