Maximowicz's vole
... that the tail of Maximowicz's vole can be either dark brown or bicoloured?
... that the tail of <b id="mwBUM"><a href="./Maximowicz's_vole" id="mwBUQ" rel="mw:WikiLink" title="Maximowicz's vole">Maximowicz's vole</a></b> can be either dark brown or bicoloured?