1. U.S. Department of Agriculture, Animal Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, Colorado 80521-2154.
2. Department of Fish, Wildlife, and Conservation Biology, Colorado State University, Fort Collins, Colorado 80523-1474.
3. U.S. Department of Agriculture, Animal Plant Health Inspection Service, Wildlife Services, 233 Pangelinan Way, Barrigada, Guam 96913.