The raccoon, sometimes spelled racoon, also known as the common raccoon, North American raccoon, northern raccoon, or coon, is a medium-sized mammal native to North America. The raccoon is the largest of the procyonid family, having a body length of 16 to 28 in and a body weight of 11 to 57 lb. Its grayish coat mostly consists of dense underfur which insulates it against cold weather. Three of the raccoon's most distinctive features are its extremely dexterous front paws, its facial mask, and its ringed tail, which are themes in the mythologies of the indigenous peoples of the Americas. Raccoons are noted for their intelligence, with studies showing that they are able to remember the solution to tasks for at least three years. They are usually nocturnal and omnivorous, eating about 40% invertebrates, 33% plants, and 27% vertebrates. The original habitats of the raccoon are deciduous and mixed forests, but due to their adaptability they have extended their range to mountainous areas, coastal marshes, and urban areas, where some homeowners consider them to be pests.