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Photo: Bernard Gagnon, CC0 via Wikimedia Commons
Rio Frío are biological humid areas considered to be one of the richest in biological diversity in Costa Rica. Here you can find a great variety of resident and migratory birds plus three different species of monkeys, also iguanas, sloths, turtles and caymans. Along the river you can see many birds, howler monkeys, spider monkeys, white-faced monkeys, also the three-toed sloth and some reptiles like caimans, Jesus Christ lizard and turtles.
Caño Negro Wildlife Refuge is a wildlife refuge, part of the Arenal Huetar Norte Conservation Area, in the northern part of Costa Rica, 30 kilometres (19 mi) southeast of Upala near the border with Nicaragua in the Alajuela province. The refuge is a wetlands site that is home to many migratory waterfowl during part of the year. It was designated a reserve in 1984 and a Ramsar site on 27 December 1991.
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