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Southern bog lemming
The southern bog lemming (''Synaptomys cooperi'') is a small North American lemming. Its range overlaps with the other species in genus ''Synaptomys'', the northern bog lemming, in southeastern Canada but extends further south.
==Description==
The southern bog lemmings are small mammals that are more closely related to voles. They are covered with thick brownish fur on the back ranges in color from reddish to dark brown and have a grizzled appearance. The belly is silver-gray. The grooved upper incisors and a relatively shorter tail distinguish this species from other voles. They have relatively large head and small eyes. The ears barely show through puffy head fur. The southern bog lemmings have 4 toes and 1 small, nailed thumb on the forefeet and 5 toes on the hind feet. Females have 6 mammary glands, which distinguishes this species from its closest relative, northern bog lemmings, which have 8 mammary glands. They have round thick bodies covered with grey-brown fur with silver grey underparts. They have a large head, short legs and a short tail which is lighter underneath. Their small ears are barely visible through their fur. Their upper incisors are grooved. They are long with a tail and weigh about .
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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