List of Costa Rican monkey species

[4][5] Each of the four species can be seen in national parks within Costa Rica, where viewing them in natural surroundings is a popular tourist attraction.

[13] The white-faced capuchin, which has a range from Honduras to Ecuador,[14] is the second smallest Costa Rican monkey.

[9] The mantled howler, with a range from Mexico to Ecuador,[15] is the second largest monkey species in Costa Rica.

Under this theory, the squirrel monkey's ancestors arrived in Central America between 3 and 3.5 million years ago, but could not compete effectively when the ancestors of the other species arrived in Central America about 2 million years ago.

Another factor may be the Central American squirrel monkey's preference for lowland, coastal areas, which may make them more vulnerable to significant population declines due to occasional major hurricanes.

[1][21] Confusion may have resulted from the fact that over part of its range Geoffroy's tamarin is locally referred to as mono titi, which is a name also used for the Central American squirrel monkey in Costa Rica.