Glenn Johnson is an Emeritus Professor in the Biology Department at SUNY Potsdam, where he taught 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 co-authored a field guide to amphibians and reptiles of New York. He has taught a Dendrology (tree) course numerous times, including several times for SOAR, and Biology of Woody Plants at SUNY Potsdam in alternate years.

Classes:


Past Classes:
Fall 2026 - Trees and Shrubs of the North Country [F-26-46]
Spring 2026 - Conservation Efforts for Threatened North Country Wildlife [S-26-10]
Fall 2024 - Trees and Shrubs of the North Country [F-24-38]
Fall 2023 - Trees and Shrubs of the North Country [F-23-47]
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]