有羽毛恐龙（Feathered dinosaurs）。羽毛是鸟跖类主龙的祖征，属于鸟跖类主龙的恐龙和翼龙都发现有羽毛，由此可见恐龙有羽毛不是后天演变出现的，而是继承祖先原有的祖征。
有羽毛恐龙——是不是大多数的(非鸟类)恐龙都覆盖着少许羽毛？
Feathered dinosaurs - Were most dinosaurs actually with a light coating of feathers?
考虑到虱子系统树的悠久历史，很可能虱子先传播到是鸟类祖先的有羽毛恐龙身上了。
Given the ancient root of the louse family tree, it is likely that the first louse infested the feathered dinosaurs that were the birds' ancestors, he concludes.
四翼兽脚类恐龙有羽毛恐龙的发现了所谓的，这些被认为是失踪的恐龙和鸟类之间的联系。
Four Winged Feathered dinosaurs called Theropods have been found; these are considered to be the missing link between dinosaurs and birds.
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