David L. Propst is adjunct professor and associate curator in the Department of Biology and Museum of Southwestern Biology at the University of New Mexico. He is coauthor of Fish of the Rockies. He lives in Albuquerque, NM. Jack E. Williams is emeritus senior scientist for Trout Unlimited. Most recently, he is coeditor of Trout and Char of the World. He lives in Oregon’s Rogue River Valley. Kevin R. Bestgen is a senior research scientist in the Department of Fish, Wildlife, and Conservation Biology as well as director of the Larval Fish Laboratory at Colorado State University. He lives in Fort Collins, CO. Christopher W. Hoagstrom is professor in the Department of Zoology at Weber State University. He lives in Ogden, UT.