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A Columbian mammoth (Mammuthus columbii) is a species of large elephant native throughout Mexico and the United States, except northeastern United States. It was once extinct, but has since been brought back from extinction by SciiFii and was reintroduced by SciiFii's conservationists to boost biodiversity and to allow extinct animals to retain their own ecological niches. The Columbian mammoth is among the largest known land mammals alive today, larger than an African elephant in size, although the Asian straight-tusked elephant is much bigger. It is a herbivore that mainly feeds on grasses, shrubs, as well as some leaves and fruits, but can occasionally feast on 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 Columbian mammoths 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 Columbian mammoth is Least Concern due to successful conservation efforts.