▁ ▁Special ized ▁b acter ia ▁in ▁its ▁gut ▁allow ▁it ▁to ▁dig est ▁leaves ▁and ▁un ri pe ▁fruit . ▁ ▁The ▁Per aw ang ▁study ▁found ▁that ▁nearly ▁ 6 0 % ▁of ▁the ▁di et ▁consisted ▁of ▁f ruits ▁and ▁se eds . ▁ ▁Another ▁ 3 0 % ▁consisted ▁of ▁leaves , ▁primarily ▁young ▁leaves . ▁ ▁A ▁different ▁study ▁found ▁that ▁fruit ▁made ▁up ▁ 4 9 % ▁of ▁the ▁di et . ▁ ▁Un like ▁some ▁other ▁mon keys , ▁such ▁as ▁the ▁long - ta iled ▁mac aque , ▁the ▁band ed ▁lang ur ▁dest ro ys ▁the ▁se eds ▁it ▁e ats , ▁and ▁so ▁it ▁is ▁not ▁a ▁significant ▁factor ▁in ▁dispers ing ▁se eds . ▁ ▁The ▁R aff les ' ▁band ed ▁lang ur ▁appears ▁to ▁have ▁two ▁birth ▁seasons , ▁once ▁between ▁June ▁and ▁July ▁and ▁another ▁between ▁December ▁and ▁January . ▁In ▁this ▁study , ▁at ▁least ▁six ▁inf ants ▁were ▁born ▁between ▁ 2 0 0 8 ▁and ▁ 2 0 1 0 , ▁and ▁the ▁authors ▁found ▁low ▁infant ▁mort ality , ▁with ▁several ▁inf ants ▁surv iving ▁at ▁least ▁to ▁seven ▁months ▁old . ▁ ▁The ▁study ▁also ▁found ▁that ▁the ▁infant ▁color ation ▁of ▁the ▁Singapore ▁population ▁is ▁ind ist ingu ish able ▁from ▁that ▁of ▁the ▁Joh or , ▁Malays ia ▁population , ▁with ▁inf ants ▁having ▁white ▁fur ▁with ▁a ▁black ▁stri pe ▁down ▁the ▁back ▁from ▁the ▁head ▁to ▁the ▁tail , ▁crossed