Pacaya Samiria National Reserve is located in the Loreta region, in the Provinces of Loreta, Requena, Ucayali and Alto Amazonas. It has a surface area of 2,080,000 hectares and due to it's size it is the largest in the country, the second largest in the Amazon, and the fourth in South America. It's central position in the Peruvian Amazon, as well as it's great expansion assure conservation of representative samples of the tropical humid forests ecosystems and supports investigations of the wild flora and fauna ( land and water). The fauna of the reserve is abundant and diverse. The number of mammal species reaches 132 species, those which stand out are the rodents and monkeys. There are 330 bird species registered, 23 of them are migratory, corresponding to 17% of all birds reported for the country. The reptiles and amphibians are estimated to be more than 150 species grouped into 20 families and they have reports of the existence of 220 fish species.