and 1,000; 130 hunters are licensed per year, and each can kill up to two deer. Some red deer were released from a hunting ranch around 1967 and may still exist as a small herd. Wild boar found their way to Florida in 1539 with Spanish colonist Hernando de Soto. Florida has 12% of the three million boars that roam in the US. They are a popular hunting prey, but are regarded as a pest, due to the damage they inflict to agriculture and environment. More than 21,000 boar were killed in 1980 alone. Marsupials The Virginia opossum is the only marsupial found in North America north of the Rio Grande. It lives in wooded areas and can be easily found statewide. Armadillos Cingulata are represented by the nine-banded armadillo, having migrated from Texas. Subsequent introductions and fast breeding spread the species statewide. Primates Six rhesus macaques were introduced sometime in the 1930s as tourist attractions, confined to an island in a Central Florida river and flourished. Charles River Laboratories, the world's biggest producer of lab animals, maintained a free-range colony until 1999, when they were forced to remove the animals after they destroyed parts of the mangrove forests in Key Haven. Other primates with reported sightings not included in this list are crab-eating macaques and squirrel monkeys. Lagomorphs All the confirmed lagomorphs in Florida are nocturnal; the black-tailed jackrabbit—introduced as a training tool for racing greyhounds from 1930 to 1950; the native eastern cottontail, which can be found anywhere but in forests and coastal marshes; and the marsh rabbit, which prefers freshwater and brackish marshes. The subspecies Lower Keys marsh rabbit has the scientific name Sylvilagus palustris hefneri after Hugh Hefner—because research on the subspecies was financed in part by the Playboy Foundation. Rodents Of the several species of rodents in Florida, the subspecies of oldfield mouse are the biggest conservation concern, along with the Florida mouse and Florida salt marsh vole. Six of eight subspecies of the oldfield mouse (commonly named beach mice) are in endangered status, and one is extinct. Given causes for their demise is predators like cats and red foxes and destruction of their natural habitats. The Florida mouse is on the endangered species list because of destruction of their habitat. The Florida mouse and Florida salt marsh vole are the only mammals that are endemic to Florida. The mouse depends on the gopher tortoise