▁and ▁Fish ▁determined ▁that ▁the ▁primary ▁cause ▁of ▁decl ine ▁of ▁the ▁white ▁s ided ▁jack ra bb it ▁in ▁New ▁Mexico ▁was ▁due ▁to ▁road ▁kill ▁caused ▁by ▁night time ▁US ▁Border ▁Pat rol ▁traffic . ▁ ▁Conserv ation ▁efforts ▁The ▁white - s ided ▁jack ra bb it ▁is ▁considered ▁end anger ed ▁throughout ▁its ▁range ▁in ▁Mexico , ▁and ▁is ▁listed ▁as ▁threatened ▁by ▁New ▁Mexico , ▁where ▁it ▁occurs ▁in ▁the ▁south west , ▁but ▁enjo ys ▁no ▁federal ▁protection ▁in ▁the ▁United ▁States . ▁A ▁ 2 0 1 1 ▁study ▁by ▁the ▁state ▁of ▁New ▁Mexico ▁estimated ▁the ▁population ▁to ▁be ▁ 4 5 ▁individuals . ▁The ▁white - s ided ▁jack ra bb it ▁commonly ▁comes ▁into ▁contact ▁with ▁agricult ure . ▁As ▁a ▁result , ▁the ▁over gra zing ▁of ▁domestic ▁liv est ock ▁may ▁be ▁one ▁of ▁the ▁factors ▁contrib uting ▁to ▁its ▁decl ine ▁and ▁the ▁apparent ▁replacement ▁by ▁the ▁black - ta iled ▁jack ra bb it ▁( L ep us ▁cal iforn icus ), ▁which ▁has ▁been ▁highly ▁adapt able ▁to ▁these ▁habitat ▁changes . ▁Pro spect s ▁for ▁the ▁surv ival ▁of ▁the ▁white - s ided ▁jack ra bb it ▁in ▁many ▁parts ▁of ▁its ▁range ▁are ▁considered ▁poor ▁at ▁best . ▁ ▁Sub species ▁The ▁two ▁sub species ▁of ▁this ▁jack ra bb it ▁are : ▁L . ▁c . ▁call ot is ▁L . ▁c . ▁ga ill ardi ▁ ▁References ▁ ▁White - s ided ▁Jack