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Glacier bear
The glacier bear (''Ursus americanus emmonsii''), sometimes referred to as the blue bear, is a subspecies of American black bear with silver-blue or gray hair endemic to Southeast Alaska. Little scientific knowledge exists of their total extent and the cause of their unique coloration. Most of the other black bears in southeast Alaska are listed under the subspecies ''Ursus americanus pugnax''.〔MacDonald, S.O. and Cook, J.A. (2007) (Mammals and amphibians of Southeast Alaska ). The Museum of Southwestern Biology, The University of New Mexico, Albuquerque, NM 87131-0001.〕〔Schoen, J and Peacock, L. (2007) "Black Bear" in J Schoen and E Dovichin (eds.) (The coastal forest and mountains ecoregion of southeastern Alaska and the Tongass National Forest ). Audubon Alaska and The Nature Conservancy, 715 L Street, Anchorage, Alaska〕
The USDA Forest Service lists'' U. a. emmonsii'' as one of several subspecies of black bears, although no evidence supports the subspecies designation other than hair coloration. 〔http://www.fs.fed.us/database/feis/animals/mammal/uram/all.html〕
==Unique features==
The chief feature distinguishing the glacier bear from other black bears is its pelage (hair coloration), which ranges from silvery blue to gray. The subspecies was reported by Dall in 1895. This variation can be seen on individual bears that are often lighter on their backs and shoulders, with their legs and belly being much darker or even black.
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