▁on ▁the ▁posterior ▁border . ▁The ▁na pe ▁is ▁och race ous ▁buff ▁in ▁color . ▁ ▁The ▁winter ▁pel age ▁of ▁the ▁white - s ided ▁jack ra bb it ▁is ▁iron ▁gray ▁on ▁the ▁r ump , ▁back , ▁and ▁outside ▁of ▁the ▁h ind ▁legs . ▁The ▁front ▁of ▁the ▁h ind ▁legs ▁and ▁the ▁to ps ▁of ▁the ▁feet ▁are ▁white . ▁The ▁front ▁of ▁the ▁fore ▁legs ▁and ▁top ▁of ▁the ▁fore ▁feet ▁range ▁from ▁a ▁pale ▁gray ▁to ▁a ▁d ull ▁iron - gray . ▁The ▁median ▁black ▁line ▁of ▁the ▁r ump ▁is ▁not ▁strongly ▁distinguish able ▁and ▁does ▁not ▁extend ▁much ▁further ▁than ▁the ▁base ▁of ▁the ▁tail . ▁The ▁top , ▁sides , ▁and ▁tip ▁of ▁the ▁tail ▁are ▁black , ▁while ▁the ▁unders ide ▁is ▁two - third s ▁white ▁and ▁one - third ▁black . ▁The ▁top ▁and ▁sides ▁of ▁the ▁head ▁and ▁back ▁are ▁dark - p ink ish ▁buff ▁over la id ▁with ▁black . ▁The ▁na pe ▁is ▁usually ▁black . ▁The ▁ears ▁are ▁dark ▁bl uff , ▁black , ▁and ▁white . ▁The ▁front ▁border ▁of ▁the ▁ears ▁are ▁fr ing ed ▁with ▁buff ▁or ▁och race ous ▁buff ▁hair s , ▁and ▁the ▁posterior ▁border ▁and ▁tip ▁are ▁white . ▁The ▁unders ide ▁of ▁the ▁neck ▁is ▁dark ▁gray ish ▁bl uff ▁and ▁the ▁remaining ▁under parts , ▁including ▁the ▁fl anks , ▁are ▁white . ▁ ▁Re production ▁The ▁bre eding ▁season ▁of ▁the ▁white -