Illustration (IMAGE) Field Museum Caption An illustration of Longipteryx, a fossil bird with unusually strong teeth right at the tip of its beak. Credit Illustration by Ville Sinkkonen. Usage Restrictions Please include credit to Ville Sinkkonen 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.