Sentence:  So you tell your friends about it, including the people who have no interest in birding and wouldn't know a Le Conte's sparrow from a <WSD>stegosaurus</WSD>. 
Meaning of the word marked with <WSD> tags:  A stegosaur, a member of the suborder Stegosauria, of the order Ornithischia of the middle Jurassic to early Cretaceous period.