and nesting in holes in fallen trees or rock crevices, often living underground. They are omnivorous, consuming fruit and small animals (including mammals). Little is known about grison behaviour for multiple reasons, one of which is that their necks are so wide compared to their heads. This has made radio tracking problematic.

Evolution

Extant species

Fossils

Grisons first appeared in South America during the early Pleistocene about 2.5 million

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