▁inv ading ▁pred ators . ▁Wil de be est ▁migr ations ▁are ▁closely ▁followed ▁by ▁v ult ures , ▁as ▁w ilde be est ▁car c ass es ▁are ▁an ▁important ▁source ▁of ▁food ▁for ▁these ▁sc av engers . ▁The ▁v ult ures ▁consume ▁about ▁ 7 0 % ▁of ▁the ▁w ilde be est ▁car c ass es ▁available . ▁Dec re ases ▁in ▁the ▁number ▁of ▁migr ating ▁w ilde be est ▁have ▁also ▁had ▁a ▁negative ▁effect ▁on ▁the ▁v ult ures . ▁In ▁the ▁Ser en get i ▁e cos ystem , ▁T anz ania , ▁w ilde be est ▁may ▁help ▁facil itate ▁the ▁migration ▁of ▁other , ▁smaller - b od ied ▁gra z ers , ▁such ▁as ▁Thom son ' s ▁gaz elles ▁( E ud or cas ▁th om son ii ), ▁which ▁eat ▁the ▁new - g row th ▁grass es ▁stim ulated ▁by ▁w ilde be est ▁for aging . ▁ ▁Inter actions ▁with ▁non pred ators ▁Z eb ras ▁and ▁w ilde be est ▁group ▁together ▁in ▁open ▁sav ann ah ▁environments ▁with ▁high ▁ch ances ▁of ▁pred ation . ▁This ▁grouping ▁strategy ▁reduces ▁pred ation ▁risk ▁because ▁larger ▁groups ▁decrease ▁each ▁individual ' s ▁chance ▁of ▁being ▁h unted , ▁and ▁pred ators ▁are ▁more ▁easily ▁seen ▁in ▁open ▁areas . ▁The ▁season al ▁presence ▁of ▁thousands ▁of ▁mig rat ory ▁w ilde be ests ▁reduces ▁local ▁l ion ▁pred ation ▁on ▁g ira ffe ▁cal ves , ▁resulting ▁in