Sentence:  The Afghan urial, which is smaller than the Transcaspian urial, is found in the mountains near Iran's eastern frontier, and is the wild sheep of Afghanistan and western Pakistan. Its <WSD>ruff</WSD> is black sprinkled with white hairs and its bib is white. 
Meaning of the word marked with <WSD> tags:  A collar of lengthened or distinctively coloured fur on or around the neck of an animal.