Raccoons are mammals native to the Americas in the genus Procyon of the Procyonidae family. Raccoons are notable for their thumbs, which (though not opposable) enable them to open many closed containers (such as garbage cans) and doors. They are intelligent omnivores with a reputation for slyness and mischief.
All raccoons are nocturnal and omnivorous, eating berries, insects, eggs and small animals. Raccoons sometimes wash, or douse, their food in water before eating it. It is unknown why raccoons perform dousing, but cleaning food is unlikely to be the reason. Studies have found that raccoons engage in dousing motions when water is unavailable; researchers note that captive raccoons are more likely than wild raccoons to douse food. It has been suggested that captive raccoons are mimicking fishing and shellfish-foraging behaviors. It may also be that the raccoon is searching for unwanted material, as water is thought to heighten their sense of touch.
As city dwellers in the United States and Canada increasingly move into primary or second homes in erstwhile rural areas, raccoons are often considered pests because they forage in trash receptacles.
Raccoons can carry Baylisascaris roundworm, distemper, and rabies. Of the approximately 8,000 documented animal rabies cases in the United States, raccoons constitute approximately 50%.
In most states of the United States it is illegal to keep raccoons as pets. Many other states allow the practice, but require exotic pet permits. Young orphan raccoons and raccoons acquired from reputable breeders may make suitable pets; however, raccoons are not domesticated animals. Training raccoons is an intensive and ongoing process, and captive raccoons may retain destructive or aggressive natural behaviors, such as biting. Some douse their food in or defecate into the water dishes of other pets. Although nocturnal, captive raccoons can be trained to sleep at night and to be active during the day. Captive raccoons can develop obesity and other disorders due to unnatural diet and lack of exercise; furthermore, many veterinarians will not treat raccoons. Raccoons raised in captivity and released do not adapt well to life outside.