ance ▁by ▁mark ing ▁their ▁c ages ▁with ▁an ▁o ily ▁secret ion . ▁ ▁Range ▁ ▁The ▁known ▁distribution ▁of ▁Mar m osa ▁ro bin son i ▁extends ▁from ▁Fin ca ▁Santa ▁Clara ▁in ▁the ▁western ▁Pan aman ian ▁province ▁of ▁Ch iri qu ì , ▁east ward ▁across ▁the ▁is th mus ▁to ▁Colombia ▁and ▁northern ▁Venezuela . ▁Although ▁most ▁Venez uel an ▁spec im ens ▁are ▁from ▁north ▁of ▁the ▁Or in oco ▁River , ▁found ▁one ▁spec imen ▁from ▁Ciudad ▁Boliv ar ▁on ▁the ▁south ▁( right ) ▁bank ▁of ▁the ▁river ▁in ▁Boliv ar ▁state . ▁The ▁species ▁is ▁also ▁known ▁from ▁several ▁islands ▁on ▁the ▁contin ental ▁sh elf ▁of ▁Central ▁America ▁( e . g ., ▁Is la ▁del ▁Rey , ▁Is la ▁Sab oga ) ▁and ▁South ▁America ▁( Is la ▁Mar gar ita , ▁Tr in idad , ▁and ▁Tob ago ), ▁and ▁from ▁the ▁Car ib bean ▁island ▁of ▁Gren ada . ▁ ▁Re production ▁ ▁Mar m osa ▁ro bin son i ▁reprodu ces ▁according ▁to ▁a ▁simple ▁schedule . ▁It ▁gives ▁birth ▁to ▁ 6 ▁to ▁ 1 4 ▁young ▁after ▁a ▁gest ation ▁period ▁of ▁just ▁ 1 4 ▁days . ▁The ▁tiny ▁young , ▁meas uring ▁only ▁up ▁to ▁ 1 2 ▁mill im eters , ▁attach ▁themselves ▁to ▁the ▁mother ' s ▁m amma e ▁where ▁they ▁may ▁remain ▁for ▁around ▁ 3 0 ▁days . ▁Un like ▁many ▁mars up ial s , ▁female ▁mouse ▁op os