The animal famous 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 incredible adaptation allows them to browse on the leaves and foliage of tall trees, particularly acacias, which other herbivores cannot reach. Their long necks are supported by a specialized skeletal structure, and they possess unique blood circulation systems to manage the high blood pressure needed to pump blood to their heads. This distinctive feature not only aids in feeding but also plays a role in social interactions and mating displays.