The study was quantitative, observational, cross-sectional, realized with the purpose of knowing the prevalence of parasites in the liver and lung of wild ungulates from the Pucacuro National Reserve and the Nueva Esperanza Community, Loreto-Peru. The samples were collected by hunters for self consumption; however, fluids and viscera were saved for later studies, and the organs were preserved in 10% formalin. These organs were directly observed to find the parasites macroscopically with the help of the stereoscope, they were rinsed with lactophenol and then identified under the microscope using taxonomic keys. Seven tissue parasites belonging to the genera Metastrongylus, Aspidodera, Paraspidodera, Parabronema, Paragonimus, Linguatula and the family Filariidae were identified. In huangana a prevalence of 54.05% was recorded and in sajino 50%, which in both cases corresponds to an average...