▁back ▁to ▁sleep ," ▁he ▁said . ▁The ▁t ars ier ▁mainly ▁d ines ▁on ▁insect s , ▁usually ▁cr ick ets , ▁and ▁fro gs . ▁Its ▁chief ▁pred ator , ▁on ▁the ▁other ▁hand , ▁is ▁the ▁common ▁house ▁cat . ▁The ▁estimated ▁ 1 0 0 ▁tar si ers ▁in ▁the ▁P T FI ▁san ctu ary ▁can ▁clim b ▁over ▁the ▁surrounding ▁seven - foot - high ▁net ▁f ence ▁to ▁h unt ▁elsewhere ▁at ▁night . ▁But ▁they ▁almost ▁always ▁return ▁before ▁day break . ▁The ▁f ence ▁is ▁actually ▁more ▁for ▁keeping ▁the ▁c ats ▁out ▁and ▁the ▁insect s ▁in , ▁P iz arr as ▁explained . ▁Thus , ▁he ▁and ▁two ▁other ▁staff ▁members ▁have ▁made ▁it ▁their ▁daily ▁morning ▁routine ▁to ▁inspect ▁the ▁net ▁for ▁bre aches . ▁At ▁night , ▁with ▁the ▁help ▁of ▁strong ▁fog ▁lights , ▁flying ▁insect s ▁from ▁neighbor ing ▁hills ▁are ▁drawn ▁to ▁the ▁san ctu ary , ▁providing ▁the ▁tar si ers ▁a ▁steady ▁menu . ▁ ▁As ▁an ▁extra ▁labor ▁of ▁love ▁for ▁his ▁w ards , ▁P iz arr as ▁and ▁his ▁team ▁bring ▁in ▁insect ▁eggs ▁that ▁they ▁find ▁outside ▁the ▁san ctu ary ▁for ▁h atch ing . ▁ ▁Capt ivity ▁itself ▁is ▁[ the ▁animal ' s ] ▁death ▁sentence . ▁It ▁can ▁be ▁so ▁sensitive ▁that ▁a ▁camera ▁flash ▁can ▁kill ▁it . ▁ ▁In correct ly ▁regarded ▁by ▁Filip inos ▁as ▁the ▁world ' s ▁smallest ▁" mon key ,"