The Osa peninsula is one of Earth's most biodiverse areas, with at least half of all species living in Costa Rica found here.
I stayed at the Drake Bay Wilderness Lodge, from where I visited Corcovado National Park and the mangroves of the Sierpe River.
Corcovado National Park
Mammals
White-nosed coati (Nasua narica), known as pizote in Costa Rica.
Collared peccary (Dicotyles tajacu)
Brown-throated sloth (Bradypus variegatus)
Geoffroy's spider monkey (Ateles geoffroyi) is the largest of the four species of monkey found in Costa Rica.
Black-crowned Central American squirrel monkey (Saimiri oerstedii oerstedii).
Unidentified bats (Chiroptera) hanging under a leaf.
Birds
The common black hawk (Buteogallus anthracinus) is a mainly coastal, resident bird of mangrove swamps, estuaries and adjacent dry open woodland.
Crested guan (Penelope purpurascens).
The dot-winged antwren (Microrhopias quixensis) is a bird of the understory of wet forest, especially at edges and clearings, tall second growth.
The slaty-tailed trogon (Trogon massena) mainly inhabits the midstory to the canopy of tropical evergreen forest and mature secondary forest.
Insects
Drake Bay
Mammals
Panamanian white-faced capuchin (Cebus imitator). These monkeys came in to scavenge for scraps behind the kitchen at Drake Bay.
Birds
Bare-throated tiger heron (Tigrisoma mexicanum).
Scarlet macaw (Ara macao).
Black vulture (Coragyps atratus).
Sierpe River
I took a boat trip along the Sierpe River, which flows through large expenses of mangrove swamp.
Birds
Amazon kingfisher (Chloroceryle amazona).
Green kingfisher (Chloroceryle americana)
Mangrove swallow (Tachycineta albilinea)
Boat-billed heron (Cochlearius cochlearius)
Little blue heron (Egretta caerulea)
Yellow-crowned night heron (Nyctanassa violacea)
Bare-throated tiger heron (Tigrisoma mexicanum).
Whimbrel (Numenius phaeopus).
Southern lapwing (Vanellus chilensis).
Mammals
Brown-throated sloth (Bradypus variegatus).
Bats, order Chiroptera.
Black-crowned Central American squirrel monkey (Saimiri oerstedii oerstedii)
Reptiles
Green iguana (Iguana iguana).
American crocodile (Crocodylus acutus).
