The Korean Peninsula is rich in varieties of plant life typical of temperate regions. More than 3,000 species, some 500 of them unique to Korea, have been noted by botanists. Warm temperate vegetation, including camellias and other broad-leaved evergreens, predominate in the south and on Cheju Island. Zoologists have identified more than 130 freshwater fishes, 112 breeding birds, 49 mammals, and 14 reptiles and amphibians on the peninsula. Bear, wild boar, deer, and lynx still are found in the highlands, but the shrinking of the forested area has reduced the animal population in recent years. Migratory water fowl, cranes, herons, and other birds are visible on the plains. Noxious insects and household pests infest the warmer regions, and aquatic life is generally infected with parasites.