Katherine C. Kendall Harold D. Picton 1994 While past work concluded that thin-layer chromatography (TLC) was inadequate for the separation of grizzly (<i>Ursus arctos horribilis</i>) and black bear (<i>U. americanus</i>) scats, our study found differences adequate for species separation. A key was constructed using 19 of 40 data points recorded on each(<i>N</i>)=356 profiles of 178) know-species scat. Accuracy was best for late summer scats (94%). Methods for specimen preparation, analysis, and reading the TLC profiles are discussed. Factors involved in scat variation were tested. application/pdf 10.2307/3872737 en International Conference on Bear Research and Management Chromatographic (TLC) differentiation of grizzly bear and black bear scats article