Department of Paleontology, American Museum of Natural History

Professor Emeritus of Wildlife Ecology, University of Massachusetts Amherst

Gahan Endowed Professor of Entomology, University of Florida

Tall Timbers Research Station

Botanical Garden of the University of Bern

Millsaps College

Ecologist, US Geological Survey

Professor of Biology

Université du Québec à Chicoutimi

Canisius College