A Brumby or broom-tail
In Australia, a wild horse is known as a brumby.
The name of this type of horse is called a 'Brumby'.
Brumbies
The wild but rare Equus horse can be found in the grassland of Australia.
Wild horse (Mustang) groups are called bands in the US, or sometimes a herd of mustangs. In Australia they would be called a herd or mob of brumbies and the same would go for New Zealand or kaimanawa wild horses.
I don't approve of the name 'feral' but another name is Brumby, the wild horses of Australia.
The only true wild horse is the Przewalski's horse.
Prewalski's horse.
MONGOLIA also known as the Asian Wild Horse or Mongolian Wild Horse, or Takhi
The Spanish name for a mustang is "caballo mustang."
Wild horses are called different things all over the world. In America they are sometimes called mustangs. In Australia they are called a brumby. Another name is cayuse.
The scientific name for the Przewalski's wild horse is Equus ferus przewalskii. It is the only remaining truly wild horse species in the world.