 Internationally, he received a Contribución Distinguida award from the president of Mexico for his role in establishing the Sierra de Manantlán Biosphere Reserve (1987), the Luz María Villarreal de Puga Medal from the University of Guadalajara (1994), and an honorary doctorate from the same university (2007).He received the Sol Feinstone Environmental Award conferred by the State University of New York College of Environmental Science and Forestry (1990), the National Wildlife Federation's Merit Award (1992), and the Society for Conservation Biology Service Award (1994).On Earth Day 2017, he was posthumously inducted into the Wisconsin Conservation Hall of Fame.