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This bulletin, a joint contribution of the Bureau of Biological Survey and the Arizona Agricultural Experiment Station, contains a summary of the results of investigations of the relation of a subspecies of kangaroo rat to the carrying capacity of the open ranges, being one phase of a general study of the life histories of rodent groups as they affect agriculture, forestry, and grazing.
Twenty morpholoigcl characters in addition to color were studied throughout the geographic range of two species of kangaroo rats, the banner-tailed kangaroo rat Dipodomys spectabilis and the desert kangaroo rat Dipodomys deserti. A total of 2725 specimens from 689 localities was examined in this study: 1,187 specimens from 368 localities for D. spectabilis and 1,538 specimens from 321 localities for D. deserti. The two species are characterized and notes are given concerning their habitat, longevity, predators, parasites, molt, and reproductive activity.
"Life History of the Kangaroo Rat" is research on a kangaroo rat's morphology, looks, build, and habits. The book is written by the entomologist from the Agricultural Experiment Station, University of Arizona, Charles T. Vorhies, and the biologist from the Bureau of Biological Survey, U. S. Department of Agriculture. It shares details of how kangaroo rats build their homes, store their food, their natural enemies, and many more.