The Mammal Collection Database is online and searchable, including all specimen information and digitized specimens.
As of June 2023 the Mammal Collection contains over 33,000 cataloged specimens (skins, skeletons, and skulls) of 163 species from 25 families. The Mammal Collection contains 23 Type specimens, 4 federally endangered species and two federally threatened species.
Type specimens in the INHS Mammal Collection
| Common name | Scientific Name | Year | Collector | Country |
| Allen’s big-eared bat | Idionycteris phyllotis hualapaiensis | 1962 | B. Musgrove | USA |
| Arizona shrew | Sorex arizonae | 1949 | W. W. Goodpaster | USA |
| Asian house shrew | Suncus murinus | 1913 | – | Republic of the Philippines |
| black-eared pygmy squirrel | Exilisciurus concinnus luncefordi | 1923 | E. H. Taylor | Republic of the Philippines |
| Botta’s pocket gopher | Thomomys bottae carri | 1951 | R. G. Van Gelder | USA |
| Botta’s pocket gopher | Thomomys bottae rufidulus | 1953 | D.F. Hoffmeister | USA |
| cactus mouse | Peromyscus eremicus eremicus | 1953 | Robert W. Dickerman | Mexico |
| eastern pipistrelle | Pipistrellus subflavus subflavus | 1957 | W. L. Jennings | USA |
| horseshoe bat | Rhinolophus subrufus | 1923 | E. H. Taylor | Republic of the Philippines |
| marsh rice rat | Oryzomys palustris natator | 1932 | O. C. Van Hyning | USA |
| Old World leaf-nosed bat | Hipposideros wrighti | 1923 | E. H. Taylor and J. S. Wright | Republic of the Philippines |
| pencil-tailed tree mouse | Chiropodomys calamianensis | 1918 | E. H. Taylor | Republic of the Philippines |
| plains pocket gopher | Geomys bursarius missouriensis | 1955 | C. A. McLaughlin | USA |
| prairie vole | Microtus ochrogaster haydenii | 1973 | W. D. Severinghaus | USA |
| rock mouse | Peromyscus difficilis saxicola | 1948 | H. O. Wagner | Mexico |
| Sanborn’s long-nosed bat | Leptonycteris curasoae sanborni | 1950 | D. F. Hoffmeister | USA |
| short-nosed fruit bat | Cynopterus brachyotis | 1920 | E. H. Taylor | Republic of the Philippines |
| shrew | Crocidura beatus | 1923 | E. H. Taylor | Republic of the Philippines |
| silky pocket mouse | Perognathus flavus goodpasteri | 1953 | C.A. McLaughlin | USA |
| southwestern myotis | Myotis auriculus apache | 1951 | D. F. Hoffmeister | USA |
| spotted ground squirrel | Spermophilus spilosoma ammophilus | 1956 | W. H. Davis | Mexico |
| Texas pocket gopher | Geomys personatus maritimus | 1938 | Rollin H. Baker | USA |
| Washington ground squirrel | Spermophilus washingtoni washingtoni | 1942 | Ernest S. Booth | USA |