Qualla: Mona and Monito Islands Nature Reserve

Mona and Monito Islands Nature Reserve: Introduction

Fri, 06 Mar 2026 00:00:00 GMT

Photo credit Souancé, 1856, CC BY-SA 3.0. Forty-one miles off the west coast of Puerto Rico, in the turbulent Mona Passage where the Atlantic meets the Caribbean, an island sits that almost nobody visits. Mona has no airport, no ferry schedule, no hotel. Reaching it requires a permit from Puerto Rico's Department of Natural Resources and, typically, a private boat from Cabo Rojo. The reward for that effort is 38,893 acres of protected wilderness -- the largest nature reserve in the Commonwealth of Puerto Rico, bigger even than El Yunque National Forest on the main island. Scientists call it the Galapagos of the Caribbean, and the comparison is earned.

Image: Souancé, 1856 | CC BY-SA 3.0

Mona and Monito Islands Nature Reserve: Written in Stone

Fri, 06 Mar 2026 00:00:00 GMT

Photo credit Serge Aucoin, CC BY-SA 4.0. The Taino knew the island as Amona, and they left their marks deep inside its limestone caves -- petroglyphs and pictographs that archaeologists have studied for decades. Spanish colonists followed, carving their own graffiti into the same cave walls during the colonial and pirac...

Image: Serge Aucoin | CC BY-SA 4.0

Mona and Monito Islands Nature Reserve: The Iguana's Kingdom

Fri, 06 Mar 2026 00:00:00 GMT

Photo credit U.S. Fish and Wildlife Service Southeast Region, Public domain. The Mona ground iguana is the largest native land animal in the entire Puerto Rican archipelago, stretching 1.22 meters from snout to tail. It exists nowhere else on Earth. Only about 1,500 remain, their numbers driven down by feral cats that prey on the young and wild boar that ...

Image: U.S. Fish and Wildlife Service Southeast Region | Public domain

Mona and Monito Islands Nature Reserve: Cactus, Turtles, and a Lost Parrot

Fri, 06 Mar 2026 00:00:00 GMT

Photo credit U.S. Fish and Wildlife Service Southeast Region, Public domain. Mona shelters the largest population of the Puerto Rico applecactus, locally called higo chumbo -- meaning "weighed-down prickly pear" for the way its arms lean under the weight of their own fruit. This critically endangered cactus survives almost exclusively in the Mona Passage ...

Image: U.S. Fish and Wildlife Service Southeast Region | Public domain

Mona and Monito Islands Nature Reserve: An Island That Requires Permission

Fri, 06 Mar 2026 00:00:00 GMT

Photo credit Alopiasmag at English Wikipedia, CC BY 2.5. Monito, Mona's smaller companion, rises from the sea three miles to the northwest -- a sheer-cliffed speck less than a mile across, home to the rare Monito gecko and little else. Together the two islands were designated a National Natural Landmark in 1975 and a nature reserve in ...

Image: Alopiasmag at English Wikipedia | CC BY 2.5