Mastodon largest male specimens, the 35-year-old AMNH 9950 was tall and weighed , while another was tall and weighed . Like modern elephants, the females were smaller than the males. They had a low and long skull with long curved tusks, with those of the males being more massive and more strongly curved. Mastodons had cusp-shaped teeth, very different from mammoth and elephant teeth (which have a series of enamel plates), well-suited for chewing leaves and branches of trees and shrubs. Based on the characteristics of mastodon bone sites, it can be inferred that, as in modern proboscideans, the mastodon social
Extinct in the wild survival techniques, which are often passed from parents to offspring during parenting, may be lost. While conservation efforts may preserve some of the genetics of a species, the species may never fully recover due to the loss of the natural memetics of the species. An example of a successful reintroduction of an EW species is Przewalski's horse, which as of 2018 is considered to be an Endangered species, following reintroduction started in the 1990s. Extinct in the wild An extinct in the wild (EW) species is one which has been categorized by the International Union for Conservation of Nature as