Dictionary.com
Thesaurus.com

tree creeper

American  

noun

  1. creeper7


tree creeper British  

noun

  1. any small songbird of the family Certhiidae of the N hemisphere, having a brown-and-white plumage and slender downward-curving bill. They creep up trees to feed on insects

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of tree creeper

First recorded in 1805–15