Glenn Johnson is a Professor and Chair of the Biology Department at SUNY Potsdam, where I teach conservation biology, ecology, dendrology and vertebrate biology courses mostly. His main interest is Conservation Biology, especially endangered vertebrates and most particularly amphibians and reptiles. He coauthored a field guide to amphibians and reptiles of New York. Glenn taught a Dendrology (trees) course numerous times, including three times for SOAR. He teaches Biology of Woody Plants at SUNY Potsdam in alternate years.
Fall 2022 - Trees and Shrubs of the North Country [F-22-30]
Fall 2018 - Trees and Shrubs of the North Country [F-18-57]
Fall 2014 - North Country Trees and Shrubs [F-14-44]
Spring 2011 - Amphibians and Reptiles of the North Country [S-11-3]
Fall 2010 - Trees of the North Country [F-10-48]