Sri Lanka maintains 26 national parks, 61 sanctuaries, 4 nature reserves, and 3 strict nature reserves across an island spanning 65,610 square kilometers. The Department of Wildlife Conservation operates under the Ministry of Wildlife and Forest Resources Conservation, establishing the first protected area at Yala in 1900 under British colonial administration as a game sanctuary. Parliament enacted the Fauna and Flora Protection Ordinance in 1937, providing the legal framework that governs wildlife conservation across all protected territories. The protected area network covers approximately 26 percent of Sri Lanka's total land area, one of the highest proportions in Asia. The Central Environmental Authority and Forest Department share jurisdiction over certain reserves, creating administrative complexity that affects enforcement capacity in buffer zones.
Yala National Park occupies 979 square kilometers in the southeastern dry zone, divided into five blocks with Block One comprising 141 square kilometers open to visitors. British colonial authorities designated the area as a sanctuary in 1900, converting it to national park status on February 25, 1938. The park records the highest leopard density globally at one animal per square kilometer in Block One, based on camera trap studies conducted by the Department of Wildlife Conservation between 2015 and 2018. Researchers documented 49 individual leopards in Block One during that period using photographic identification of rosette patterns. Yala hosts 44 mammal species including Sri Lankan elephant, sloth bear, and Sri Lankan axis deer. The coastline extends 32 kilometers along the Indian Ocean, incorporating beaches, dunes, and rocky outcrops. Block One receives approximately 500,000 visitors annually, generating significant revenue but creating disturbance that researchers at University of Peradeniya documented affects leopard movement patterns during daylight hours.
Wilpattu National Park covers 1,317 square kilometers in the northwest dry zone, making it the largest national park in Sri Lanka by area. The name derives from "willus," natural sand-rimmed water basins that number approximately 60 within park boundaries. Authorities closed Wilpattu during the civil war from 1985 to 2003, allowing wildlife populations to recover without human disturbance. The park reopened with restricted access in March 2003, then closed again until 2010 when the government permitted tourism in western sections. Wilpattu supports an estimated 50 to 60 leopards based on surveys conducted in 2015, though lower visitor numbers compared to Yala mean fewer documented sightings. The park records 31 mammal species and 149 bird species in official inventories. Researchers from University of Colombo identified the park's importance for water birds, with villu ecosystems supporting purple heron, painted stork, and spot-billed pelican populations during the dry season from May through September.
Udawalawe National Park encompasses 308 square kilometers surrounding Udawalawe Reservoir in the southern dry zone. The government created the park on June 30, 1972, immediately following reservoir completion, to provide habitat for animals displaced by the Udawalawe irrigation project. The park maintains an estimated elephant population between 400 and 600 individuals, monitored through annual counts conducted each July during the dry season peak. These counts utilize direct observation from vehicles in open terrain, considered more reliable than estimates in forested parks. The Elephant Transit Home operates at the park boundary, established in 1995 by the Department of Wildlife Conservation to rehabilitate orphaned elephant calves. The facility releases rehabilitated elephants directly into Udawalawe when individuals reach approximately five years of age. Bird surveys documented 184 species within park boundaries, with concentrations around the reservoir attracting migrant waterfowl from November through March. The park terrain consists of scrubland and grassland with minimal tree cover, facilitating wildlife observation that attracts approximately 200,000 visitors annually.
Minneriya National Park covers 88.9 square kilometers centered on the 3rd century Minneriya Tank constructed during the reign of King Mahasen. The government declared national park status on August 12, 1997, protecting the area after previous designation as a wildlife sanctuary in 1938. The Gathering occurs annually from July through September when approximately 300 to 400 elephants concentrate around the tank as surrounding water sources evaporate. Researchers at Centre for Conservation and Research have monitored this event since 2008, documenting peak numbers typically in August when the reservoir shoreline contracts to minimal area. The phenomenon represents one of the largest elephant gatherings globally, attracting elephants from a population spanning Minneriya, Kaudulla, and Girithale national parks in a total area exceeding 400 square kilometers. DNA analysis conducted by University of Colombo researchers between 2010 and 2014 identified this as a single interbreeding population rather than distinct groups. The tank itself spans approximately 36 square kilometers at full capacity during the northeast monsoon.
Horton Plains National Park occupies 31.6 square kilometers of cloud forest and montane grassland at elevations between 2,100 and 2,300 meters in the Central Highlands. The area received sanctuary status in 1969 and national park designation on March 16, 1988. UNESCO inscribed Horton Plains as part of the Central Highlands World Heritage Site on July 31, 2010, recognizing its biodiversity significance. World's End forms a 870-meter escarpment at the southern boundary, with a secondary precipice called Little World's End dropping 270 meters. The park protects the headwaters of three major rivers: Mahaweli, Kelani, and Walawe. Endemic species concentration reaches exceptional levels with 21 endemic birds among 87 recorded species and 16 endemic mammals among 24 species. The Sri Lankan whistling thrush, dull-blue flycatcher, and yellow-eared bulbul occur only in this montane zone. Rhododendron arboreum trees mark the forest boundaries, flowering pink and red in March and April. Temperatures range from 5 to 20 degrees Celsius year-round, with frost occurring on clear nights during the southwest monsoon from May through August.
Sinharaja Forest Reserve comprises 88.6 square kilometers of tropical lowland rainforest in the southwest wet zone. The government designated Sinharaja a forest reserve in 1875 under British administration, preventing commercial logging that eliminated most lowland rainforest elsewhere in Sri Lanka. UNESCO inscribed Sinharaja as a World Heritage Site on November 11, 1988, the first Sri Lankan site to receive this designation. The reserve demonstrates exceptionally high endemism with 139 endemic plant species among approximately 830 recorded species. Dipterocarp trees dominate the canopy, reaching heights of 45 meters. Endemic vertebrates include 72 percent of endemic bird species occurring in Sri Lanka, with 20 of the 26 endemic birds recorded within reserve boundaries. Mixed-species feeding flocks form a characteristic feature, with blue magpie, orange-billed babbler, Sri Lanka drongo, and ashy-headed laughingthrush foraging together. The reserve receives between 3,500 and 5,000 millimeters of annual rainfall, concentrated from May through July and October through November. Researchers from University of Peradeniya documented that selective logging between 1970 and 1977 affected approximately 15 percent of the reserve area before authorities halted all extraction.
Bundala National Park spans 62 square kilometers of coastal wetlands and scrubland in the southeastern dry zone. The government designated Bundala as a wildlife sanctuary in 1969, upgrading to national park status on January 4, 1993. The Ramsar Convention recognized Bundala as a Wetland of International Importance on March 2, 1991, the first such site in Sri Lanka. The park encompasses five shallow lagoons fed by seasonal streams, creating habitat for waterbirds during migration periods. Greater flamingo populations peak between August and April, with counts exceeding 5,000 individuals in some years based on Sri Lanka Audubon Society surveys. The park records 197 bird species including 58 migrants that utilize the coastal wetlands during the northern winter. Sea turtles nest on the 15-kilometer coastline, with green turtle and olive ridley turtle documented in nesting surveys conducted between 2010 and 2015. Elephant corridors cross the park, connecting populations in Yala and Lunugamvehera national parks. Visitor numbers remain substantially lower than Yala despite proximity, with approximately 15,000 annual visitors.