General terms:
* Wild pony: This is the most common term, emphasizing the pony's freedom and lack of domestication.
* Feral pony: This term implies that the pony was once domesticated but has since returned to a wild state.
* Mustang: While technically referring to feral horses of Spanish descent in the American West, it's sometimes used loosely to describe any wild horse, including ponies.
Terms specific to breed or location:
* Exmoor pony: A specific breed of wild ponies from the Exmoor National Park in England.
* New Forest pony: A breed of semi-wild ponies from the New Forest in England.
* Dartmoor pony: A breed of wild ponies from the Dartmoor National Park in England.
* Konik pony: A breed of wild ponies from Poland, known for their hardiness.
More descriptive terms:
* Untamed: This emphasizes the pony's lack of training or control.
* Unbroken: This refers to a pony that has not been ridden or trained.
* Free-ranging: This term implies the pony lives in a large, open area without human interference.
Ultimately, the best term to use depends on the specific situation and the pony's history and location.