Guayabo, Negrito and Pájaros Islands Biological Reserve
Guayabo Island is located approximately 8 Km to the south of the Puntarenas Port in the Nicoya Gulf. Negritos Island is 16.5 Km to the south and the Pájaros Islands is 13 Km to the northwest of Puerto de Puntarenas. The Guayabo and Negritos Island where established as reserves on the 28th of February 1973 and the Pájaros Island on the 28th of April 1976. The Guayabo and Negritos Island have an extension of 143.5 hectares and the Pájaros Island has an extension of 4 hectares. The islands are places of habitat and reproduction with abundant populations of sea birds, as well as species of flora characteristic to the area.
The Guayabo Island is an important rock, 50 meters high, covered with bushes and spiny plants in some areas. There are species of trees such as the fig tree, the coyol palm. On the Negritos Islands, the vegetation is semi deciduous; there are species of white flower, Pochote and Indio Desnudo. On the rocky peaks there are areas full of piñuela casera and coyol palm. On the Pájaros Island, the vegetation is made up of short forests with areas of pasture. The mixed guava, the Guanacaste, the fig tree and the golden spoon bushes are very popular here. The fauna of the islands is mainly made up of seabirds. During some periods of the year migratory birds arrive to look for food and reproduce. The most common species are the frigate birds, the black headed gull, the brown caped gannet and the Pardo pelican. This last species uses the Guayabo Island as a nesting area and it is estimated that there is a population of around 200 to 300 birds. Other species of fauna include the peregrine halcyon, the white tailed dove and the black iguana. There are violin crabs, sea crabs, cambutes, oysters and a large variety of fish.