Assertion: feather | /r/MadeOf | ostrich-like ornithomimosaurs
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text: Numerous fluffy and fuzzy non-avian dinosaurs found in China have shown that feathers were a widespread trait among coelurosaurian theropod dinosaurs - the group which contains the famous tyrannosaurs, sickle-clawed deinonychosaurs, bizarre therizinosaurs, ostrich-like ornithomimosaurs, and birds, among other lineages.