Origin: L. Supercilium an eyebrow. See Supercilious.
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... about to discover that birders seem to have given a name to every inch on a bird's body. Do you know where to find a bird's wing bars, primaries, superciliary and malar stripe? These diagrams will help: Detailed Diagrams of the Parts of the Bird Body Head—Identify the supercilium, orbital ring, ...
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