Model of the terror bird "Mesembriornis" at the Chicago Field museum, prepared by Leon L. Pray, chief taxidermist. (It is possible that he is the person at the left.) The modelling mixture consisted of casein paint, ground asbestos, chopped tow and pencil-sharpener shavings. The feathers were made of balse bood. The feet and claws were whittled out of tulip-tree wood. Though it cannot be seen in this black-and-white photoe, the model was colored to follow the coloration of the cariama (red-legged seriema), relatives of the terror birds.