The geography of Puerto Rico consists of an archipelago located between the Caribbean Sea and the North Atlantic Ocean, east of the Dominican Republic or Hispaniola, west of the Virgin Islands and north of Venezuela. The main island of Puerto Rico is the smallest and most eastern of the Greater Antilles. With an area of 3,515 square miles (9,104 km2), it is the third largest island in the United States and the 82nd largest island in the world. Various smaller islands and cays, including Vieques, Culebra, Mona, Desecheo, and Caja de Muertos comprise the remainder of the archipelago with only Culebra and Vieques being inhabited year-round. Mona is uninhabited through large parts of the year except for employees of the Puerto Rico Department of Natural Resources.
Vieques, officially Isla de Vieques, is an island and municipality of Puerto Rico, in the northeastern Caribbean, part of an island grouping sometimes known as the Spanish Virgin Islands. Vieques is part of the Commonwealth of Puerto Rico, and retains strong influences from 400 years of Spanish presence in the island.
Isla Culebra is an island, town and municipality of Puerto Rico and geographically part of the Spanish Virgin Islands. It is located approximately 17 miles (27 km) east of the Puerto Rican mainland, 12 miles (19 km) west of St. Thomas and 9 miles (14 km) north of Vieques. Culebra is spread over 5 barrios and Culebra Pueblo (Dewey), the main town and the administrative center of the island. Residents of the island are known as culebrenses. With a population of 1,792 as of the 2020 Census, it is Puerto Rico's least populous municipality.
The Puerto Rican dry forests are a tropical dry forest ecoregion located in southwestern and eastern Puerto Rico and on the offshore islands. They cover an area of 1,300 km2 (500 sq mi). These forests grow in areas receiving less than 1,000 mm (39 in) of rain annually. Many of the trees are deciduous, losing their leaves during the dry season which normally lasts from December to April.
The Spanish Virgin Islands, formerly called the Passage Islands and also known as the Puerto Rican Virgin Islands, West Virgin Islands primarily consisting of the islands of Culebra and Vieques, are part of the Commonwealth of Puerto Rico and are located east of the main island of Puerto Rico in the Caribbean.
The fauna of Puerto Rico is similar to other island archipelago faunas, with high endemism, and low, skewed taxonomic diversity. Bats are the only extant native terrestrial mammals in Puerto Rico. All other terrestrial mammals in the area were introduced by humans, and include species such as cats, goats, sheep, the small Indian mongoose, and escaped monkeys. Marine mammals include dolphins, manatees, and whales. Of the 349 bird species, about 120 breed in the archipelago, and 47.5% are accidental or rare.
Caribbean Islands National Wildlife Complex is an administrative unit of the United States Fish and Wildlife Service which oversees National Wildlife Refuges in Puerto Rico, the U.S. Virgin Islands, and Navassa Island of the U.S. Minor Outlying Islands. The NWR complex also manages the reintroduction of the critically endangered Puerto Rican parrot into the wild.
The Vieques, Puerto Rico, Naval Training Range was a United States naval facility located on the island of Vieques, about 5 miles east of mainland Puerto Rico. Starting in November 1941, the navy used the range for military exercises. Military operations ended in 2001, with the Navy completely leaving the area in 2003.
Cabo Rojo National Wildlife Refuge is an 1,836-acre National Wildlife Refuge located in southwestern Puerto Rico, in the municipality of Cabo Rojo. The refuge is a habitat for number of native bird species including the endangered yellow-shouldered blackbird, locally known as mariquita de Puerto Rico or capitán. Many birds find their way to the refuge while migrating between North and South America, and more than 118 bird species have been recorded near the area.
Puerto Ferro Light, also known as Faro de Puerto Ferro, is a historic lighthouse located in the Vieques, Puerto Rico. The light was first lit in 1896. It is one of the last minor or local lights to be built by the Spanish government. The light was of crucial importance to cross the Vieques Passage. The lighthouse was deactivated in 1926 when it was abandoned.
The Culebra National Wildlife Refuge is a National Wildlife Refuge in Puerto Rico. It is part of the Caribbean Islands National Wildlife Refuge Complex, which is a unit of the U.S. Fish and Wildlife Service. It is the site of the former Camp Roosevelt.
The Desecheo National Wildlife Refuge is a National Wildlife Refuge in Puerto Rico. It is part of the Caribbean Islands National Wildlife Refuge Complex.
The Laguna Cartagena National Wildlife Refuge is a 1043-acre National Wildlife Refuge in Lajas, Puerto Rico. It is part of the Caribbean Islands National Wildlife Refuge Complex.
The Caribbean Manatee Conservation Center is a research, education, rescue, and rehabilitation partnership established in 2009 in the Caribbean island of Puerto Rico in order to help endangered manatees survive from extinction.
Boquerón State Forest is one of the 20 forestry units that make up the public forest system of Puerto Rico. Despite its name, the Boquerón State Forest is not only located in Boquerón, Cabo Rojo but also spans almost 5,000 acres across the municipalities of Cabo Rojo, Lajas and Mayagüez. The forest area is also known for its limestone cliffs, the lighthouse, and the salt flats which have been a source of salt since the pre-Hispanic era and dating to 700 C.E. it is considered one of the oldest industries in the Americas.
The Puerto Mosquito Bioluminescent Bay or Mosquito Bio Bay, is a bay in the island of Vieques famous for its bioluminescence produced by the dinoflagellate Pyrodinium bahamense, which glows blue when agitated. This species of phytoplankton is found in bays in the Virgin Islands, Puerto Rico and The Bahamas.
Humacao Nature Reserve, or the Punta Santiago Nature Reserve, is a nature reserve located in the southeastern coast of Puerto Rico, between the municipalities of Humacao and Naguabo (Río). The 3,000-acre nature reserve was established in 1986 to protect and preserve the remaining Pterocarpus forest ecosystem in the area, along with its surrounding wetlands and mangrove forests.
Mona and Monito Islands Nature Reserve consists of two islands, Mona and Monito, in the Mona Passage off western Puerto Rico in the Caribbean. Mona and Monito Islands Nature Reserve encompasses both land and marine area, and with an area of 38,893 acres it is the largest protected natural area in the Commonwealth of Puerto Rico. Much like the Galapagos Islands in the Pacific Ocean, the Mona and Monito Islands reserve represents a living laboratory for archaeological, biological, geological, oceanographical and wildlife management research.
