High Quality Content by WIKIPEDIA articles! The Pacarana (Dinomys branickii) is a rare and slow-moving nocturnal rodent found only in tropical forests of the western Amazon River basin and adjacent foothills of the Andes Mountains from northwestern Venezuela and Colombia to western Bolivia, including the yungas. One place that it is common is Cotapata National Park in Bolivia. It is known as the pacarama (false paca) by native Indians due to its superficial similarity to a different caviomorph rodent, the paca.