Sentence:  (a wren) crept or crawled, just like a true tree-creeper. I was, as I say, quite close, and watched it most attentively. It certainly—as far as good looking can settle it—did not assist itself with the wings. They remained close against the sides, or, if they moved at all, it was imperceptible to my eyes (which, by the way, are <WSD>non-pareils</WSD>). 
Meaning of the word marked with <WSD> tags:  A person or thing that has no equal; a paragon. (from 16th c.)