wallcreeper
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wall·creep·er
(wôl′krē′pər)n.
A long-billed crimson and gray bird (Tichodroma muraria) of mountainous regions of Eurasia and Africa, that feeds on insects on rocky cliffs.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.