William L Halvorson

William Halvorson is a research ecologist with the with the U.S. Geological Surveyas Southwest Biological Science Center at the Sonoran Desert Research Station. He is also a faculty member at the School of Natural Resources and Environment at The University of Arizona.

William Halvorson is a research ecologist with the with the U.S. Geological Surveyas Southwest Biological Science Center at the Sonoran Desert Research Station. He is also a faculty member at the School of Natural Resources and Environment at The University of Arizona. See less