The uses of droppings are broad. The problem is that black bears don't stay put, and excrement decomposes quickly in the rain and moisture of the mountains. It's not easy to find a fresh piece of poop.
排遺固然用途廣大，問題是，黑熊行蹤不定，加上山區雨露濕重，排泄物很快會分解，要找到一坨「新鮮」大便可不簡單。