鸵鸟

家禽研究，侧视图，去除皮肤和下面的筋膜层，摘自“人体结构与老虎和普通家禽结构的比较解剖学阐述” Study of a Fowl, Lateral View, with skin and underlying fascial layers removed, from ‘A Comparative Anatomical Exposition of the Structure of the Human Body with that of a Tiger and a Common Fowl’，乔治·斯塔布斯