Physical Characteristics
Singing voles have short ears, often concealed by their long fur, and a short tail. The fur is soft and dense, especially in winter. They vary in color from pale tawny to pale grey, with buff-colored patches running from the undersides of the ears along the flanks to the rump, and buff or ochre underparts. The fur is lightly ticked with black guard hairs, but these are so sparse that have little effect on the visible coloration of the animal. The fur is greyer in color during the winter. The paws have sharp, narrow claws, which are largely hidden by fur.
Adult singing voles range from 9 to 16 centimetres (3.5 to 6.3 in) in length, not counting the short, 1.5 to 4 centimetres (0.59 to 1.6 in), tail. They can weigh anything from 11 to 60 grams (0.39 to 2.1 oz), depending on their exact age and recent diet. There is no significant difference in size or coloration between the two sexes. Male singing voles possess modified sebaceous glands on their flanks, which are used in scent marking; these glands have also been noted in some lactating females. The penis is relatively long and narrow, with a complex baculum.
Singing voles can be distinguished from other neighboring vole species by their shorter tails and the color of their underparts (other local voles have grey underparts).
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