(Ovis gmelini gmelini) is thought to be the ancestor of the modern domestic sheep (Ovis aries).

Many species have become extinct since the last ice age, probably largely because of human interaction. Of the survivors:
* Five are classified as endangered,
* Eight as vulnerable,
* Seven as of concern and needing conservation measures, but at lower risk, and
* Seven species are secure.

Members of the group vary considerably in size, from

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