a close-up of a macaque monkey behind bars.

animal animals animalwelfare ape attraction bars beast behindbars bittersweet cage captive captivity close closeup confinement conservation constraint creature custody cute ecology enclosure endangered exotic eyes face fauna frugivorous fur hand imprisonment jail kera life looking macaque mammal menagerie monkey monyet natural nature portrait preservation primate prison protection restraint sad safaripark safeguarding safekeeping simian species subjection subjugation wildlife wildlifepark zoo zoology