(16.804 ha), (1977). It`s situated in Guanacaste province, on
Tempsigue river mouth. In 1923 it was a part of a big Wilson ranch (owned by David Russell Stewart) expropiated by government in 1975. It`s limited by rivers and limestone Hills. There are 12
different habitats. There are the biggest concentration of wading birds in Costa
Rica and Central America. It`s inhabited by 257 species of birds (herons,
storks, egrets, ibis, ducks). It stands out with the largest colony of black-crown night herons in the country.
THere are 150 species of trees. There are also thorny
shrubs called "palo verde" (in English it`s known as horse bean) which lends its
name to the park. It provides the shelter for white-faced monkeys, crocodiles,
coatis, white-tailed deers, porcupines. It`s covered by evergreen decidous
forests and riparian forests.