The American mastodon (Mammut americanum) is a species of large elephant relative native throughout North America. It was once extinct, but has since been brought back from extinction by SciiFii and was reintroduced by SciiFii's conservationists to boost biodiversity, to allow extinct animals to retain their own ecological niches, and, in the case of some animals like American mastodon, to help mitigate global warming. The American mastodon is a large land mammal, about 8 feet tall and weigh about as much as an average-sized Asian elephant. It is a herbivore that mainly feeds on leaves, fruits, nuts, shrubs, but can occasionally feast on leaf-less branches in times of hardship. It is a social herd-dwelling animal, with adult females as well as young males and females living together, which are leaded by the matriarch (female leader), but bull male American mastodons live in mostly solitary lives unless it is breeding seasons, when males have musth and males find suitable females to mate with. The conservation status of the American mastodon is Least Concern due to successful conservation efforts.