Being able to see fauna species in Corcovado, as in the rest of the country, is a matter of luck and discipline. We say luck because it depends on the animal if its location coincides with that of the human at a precise moment. Discipline is another optional factor that can help to see animals. It is advisable to wake up early in the morning to see species of fauna, wait for minutes or hours in silence to see a specific animal or walk in for several hours in silence so as not to scare an animal and thus be able to see them. Of the 4 entrances to the national park, perhaps it is Sirena which offers the greatest possibility to see animal species. It is the most remote and isolated station. In addition, the fact that the Sirena River empties into the sea at that site, makes it more likely to see Tapirs, Sharks and Crocodiles. Maybe I can get to see an Ocelot or Puma, with extreme luck a Jaguar. However, additionally, you are much more likely to see four species of monkeys, two species of wild pigs, sloths and much more. The sighting of birds in Sirena is excellent, both in the jungle and in the mouths of both rivers, Sirena and Rio Claro. Another highly recommended entrance is San Pedrillo. This station is located closer to Drake Bay, and is a little more visited by tourists, but lately there have been several rare species of fauna in this area, including repeated sightings of Pumas.