Science. 2010 Oct 15;330(6002):320; author reply 320. doi: 10.1126/science.1192963.
Nudds and Dyke (Reports, 14 May 2010, p. 887) reported that the primary features of the early birds Archaeopteryx and Confuciusornis were too weak to power flight. This conclusion is not supported because the authors overestimated the mass of the subjects and understated the strength of the primary shafts in at least one example. The total biology of the birds indicates that they could achieve flapping flight.
努兹和戴克（Reports，2010 年 5 月 14 日，第 887 页）报告称，早期鸟类始祖鸟和孔子鸟的主要特征太弱，无法支持飞行。这一结论站不住脚，因为作者高估了研究对象的质量，并且至少在一个例子中低估了主要轴的强度。鸟类的整体生物学表明，它们能够实现拍打式飞行。
