Baby Ape

Baby Apes are apes that can be found on Jaguero Isle in the Cape of Stranglethorn. They only appear while it is raining. Note that the weather on the isle is different than the rest of the zone, so if it is raining elsewhere then it is unlikely to be raining on the isle.

Pet Journal
Young apes quickly learn to hang from branches with their feet, leaving both hands free to fling objects at interlopers.