▁and ▁an ▁ability ▁to ▁run ▁in ▁a ▁z ig - z ag ▁fashion ▁that ▁sur pass es ▁its ▁purs u ers . ▁The ▁long ▁ears ▁serve ▁to ▁locate ▁sound , ▁as ▁well ▁as ▁reg ulate ▁temperature ▁when ▁they ▁are ▁raised ▁like ▁a ▁fan ▁to ▁catch ▁passing ▁b ree zes ▁in ▁hot ▁conditions . ▁The ▁eyes , ▁like ▁those ▁of ▁most ▁no ct urn al ▁or ▁cre pus cular ▁animals , ▁are ▁later ally ▁arranged , ▁giving ▁them ▁a ▁complete ▁field ▁of ▁vision ▁( 3 6 0 ° ). ▁As ▁a ▁result , ▁approaching ▁danger ▁can ▁be ▁perce ived ▁in ▁advance . ▁ ▁A ▁consp ic uous ▁trait ▁of ▁the ▁white - s ided ▁jack ra bb it ▁is ▁its ▁t endency ▁to ▁be ▁found ▁in ▁pairs , ▁usually ▁one ▁male ▁and ▁one ▁female . ▁Its ▁pair ▁bond ▁is ▁most ▁evident ▁during ▁the ▁bre eding ▁season . ▁After ▁establishment ▁of ▁the ▁pair ▁bond , ▁the ▁male ▁def ends ▁the ▁pair ▁from ▁other ▁intr ud ing ▁males . ▁The ▁purpose ▁of ▁such ▁pair ▁b onds ▁may ▁be ▁to ▁keep ▁the ▁sex es ▁together ▁in ▁areas ▁of ▁low ▁density . ▁The ▁members ▁of ▁the ▁pair ▁are ▁usually ▁within ▁ 1 5 – 2 0   ft ▁of ▁each ▁other ▁and ▁run ▁together ▁when ▁approached ▁by ▁intr ud ers . ▁The ▁pair ▁bond ▁may ▁not ▁be ▁broken ▁during ▁pre gn ancy . ▁ ▁The ▁white - s ided ▁jack ra bb it ▁construct s ▁and ▁uses ▁shelter ▁forms ▁aver aging ▁ ▁in ▁length , ▁ ▁in ▁width