The animal known for its long neck is the giraffe. Giraffes are the tallest land mammals, with necks that can reach up to six feet in length. This distinctive adaptation allows them to browse on leaves and foliage from tall trees, primarily acacia species, giving them access to food sources that are out of reach for most herbivores. Their long necks are also supported by a unique skeletal structure that includes an extended cervical vertebrae arrangement. Giraffes are known for their intricate coat patterns, social behavior, and their gentle, calm demeanor in the wild.