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| northern red-backed vole (Clethrionomys rutilus Pall, northern sea route Севморпуть) | |||
| northern red-backed mouse (Clethrionomys rutilus); northern red-backed vole (Clethrionomys rutilus); ruddy vole (Clethrionomys rutilus) | |||
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| northern red-backed vole (Clethrionomys rutilus) | |||
| красная полёвка: 14 phrases in 4 subjects |
| Biology | 2 |
| Ecology | 2 |
| Mammals | 9 |
| Oil / petroleum | 1 |