List of mammals of Alaska
This is a list of Alaska mammals. It includes all mammals currently found in Alaska, whether resident or as migrants. With 112 mammal species, Alaska ranks 12th of the 50 U.S. states in mammalian diversity.
This article presents the common and scientific names for each species, along more information about the animal. Where the species is unique to Alaska, this article presents a brief overview of the species. Where the species is not unique to Alaska, this article gives information about the habits and distribution that are characteristic of animals occurring in the state. The range maps that accompany the descriptions vary in their precision according to the sources on which they are based. Readers are advised to click on the maps and examine the source information for more information on the species' ranges.
Eulipotyphlans
ns are insectivorous mammals. Alaska shrews have not been studied as much as most of its animals, so many particulars of their distribution, breeding cycles, and population remain unknown. Currently, ten species of shrews have been identified in Alaska, but debate remains over their identity and genetic relationships. All of Alaska's shrew species look alike to lay observers, but experts differentiate them based on their ranges and skull structure. Shrews live throughout the state, even on isolated islands, in habitats from temperate rain forests of the Southeast to Arctic tundra. They generally eat insects, spiders, and other small invertebrates, though they may also eat other vertebrates and plants. Their predators in Alaska include weasels, marten, fox, domestic cats, other shrews, and owls. Shrews may be helpful in agricultural areas by eating insects, but elsewhere they may be pests by eating household meat left uncovered. None of Alaska's shrew populations is threatened, with the possible exception of the Pribilof Island shrew.| Species | More information | Range |
| Sorex alaskanus | Glacier Bay water shrews are known from Glacier Bay National Park and Preserve in southeast Alaska. | |
| Common shrew Sorex cinereus | The common shrew is one of the two most widespread species of shrew in Alaska. It is found from the Brooks Range to Southeast Alaska. | |
| Pygmy shrew Sorex hoyi | The pygmy shrew is found throughout most of the state except the North Slope and the southeast. | |
| Pribilof Island shrew Sorex hydrodromus | The Pribilof Island shrew is found only on the Pribilof Islands. | |
| St. Lawrence Island shrew Sorex jacksoni | The St. Lawrence Island shrew is found only on St. Lawrence Island. | |
| Dusky shrew Sorex monticolus | The dusky shrew is one of the two most widespread species of shrew in Alaska. It is found from the Brooks Range to Southeast Alaska. | |
| Water shrew Sorex palustris | The water shrew is found from Southcentral and Southeast Alaska to the Alaska Range in the north. | |
| Tundra shrew Sorex tundrensis | Tundra shrews are found throughout most of the state except the southeast. | |
| Barrenground shrew Sorex ugyunak | Barrenground shrews are found on the North Slope. | |
| Tiny shrew Sorex yukonicus | The tiny shrew appears to be widespread but uncommon in Alaska. |
[Bat]s
Bats are not abundant in Alaska, and are generally found only in Southeast Alaska, some of Southcentral Alaska, and in the Interior as far north as the Yukon River.| Species | More information | Range |
| Big brown bat Eptesicus fuscus | Only one big brown bat has ever been confirmed in Alaska. It is the largest bat in Alaska, weighing on average 14g. | |
| California myotis Myotis californicus | As with other myotis species in Alaska, the California myotis often roosts in abandoned buildings and old mines; they may also be found roosting alone in trees or rock crevices. California bats have been observed hibernating in Southeast Alaska. | |
| Keen's myotis Myotis keenii | As with other myotis species in Alaska, Keen's myotis often roosts in abandoned buildings and old mines; they may also be found roosting alone in trees or rock crevices. It is suspected that it hibernates in Southeast Alaska. | |
| Little brown bat Myotis lucifugus | The little brown bat is the most common and widespread bat in Alaska. As with other myotis species in Alaska, little brown bats often roost in abandoned buildings and old mines; they may also be found roosting alone in trees or rock crevices. Little brown bats have been observed hibernating in Southeast Alaska and Kodiak Island. | |
| Long-legged myotis Myotis volans | As with other myotis species in Alaska, the long-legged myotix often roosts in abandoned buildings and old mines; they may also be found roosting alone in trees or rock crevices. It is suspected that it hibernates in Southeast Alaska. | |
| Silver-haired bat | After the big brown bat, the silver-haired bats is the largest bat in Alaska. It is only found in Southeast Alaska, and only during winter. It roosts alone in trees. |