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Montane vole
The montane vole (''Microtus montanus'') is a species of vole native to the western United States and Canada.〔
==Description==
Montane voles are medium-sized voles, with a total length of , including the tail. Adults typically weigh anything from , with males being slightly larger than females, but the actual weight varies considerably with age, geography, and subspecies. The upper body is covered with fur of a dark brownish shade, again with some variation between individuals. The fur is paler on the flanks, and fades to grey or white on the underparts. The tail exhibits the same color variation, with the fur being dark brown to almost black on the upper surface and grey or white below.
Montane voles possess scent glands on the hips, near the anus, and on the male genitalia. These glands increase in size in response to testosterone, and are therefore particularly large in adult males. At least some of these glands produce unique fatty acid esters, that may function in species recognition. Females have four pairs of teats, running from the chest to the groin.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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