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Alaska has two species of frogs. They are the Columbia spotted frog and wood frog. Alaska also is inhabited by two introduced frog species, the Pacific tree frog (also referenced as the Pacific chorus frog), and the red-legged frog. [1] The only species of toad in Alaska is the western toad. [30]
The little brown bat is the most common and widespread bat in Alaska. [7] 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. [7] Little brown bats have been observed hibernating in Southeast Alaska and Kodiak Island. [7]
Marine mammals comprise over 130 living and recently extinct species in three taxonomic orders. The Society for Marine Mammalogy, an international scientific society, maintains a list of valid species and subspecies, most recently updated in October 2015. [1] This list follows the Society's taxonomy regarding and subspecies.
Pacific ocean perch is a very slow-growing species, with a low rate of natural mortality (estimated at 0.06), a relatively old age at 50% maturity (10.5 years for females in the Gulf of Alaska), and a very old maximum age of 98 years in Alaska (84 years maximum age in the Gulf of Alaska). [25]
Alaska Maritime National Wildlife Refuge is well known for its abundance of seabirds. About 75 percent of Alaskan native marine birds, 15 to 30 million among 55 species, use the refuge. AMNWR also provides a nesting habitat for an estimated 40 million seabirds, representing 80 percent of all seabirds in North America. The birds congregate in ...
In March 2008 the US government agreed to study Alaska's ribbon seal population and considered adding it to the endangered species list. However, in December 2008, the US government decided that sea ice critical to the seals' survival will not be endangered by global warming , and declined to list the species.
A reputable marine biologist, Frederick Stratten Russell, authored the book The Medusae of the British Isles in 1953 where he stated that A. forskalea was the acceptable name for these species, and that A. aequorea was a name reserved for an unidentifiable species. [7] One notably similar species, A. victoria is found abundantly in the Pacific. [9]
The willow ptarmigan is the state bird of Alaska. The list of birds of Alaska includes every wild bird species recorded in the U.S. state of Alaska, based on the list published by the Alaska Checklist Committee. As of January 2022, there were 534 species on the official list. Of them, 55 are considered rare, 149 are casual, and 79 are accidental, all as defined below. Another 18 and a species ...