A female horse, no matter if she is wild, feral or domestic is only ever called by two things: Filly up until she turns four years old and then she is called a mare from the time she turns four until the day she dies.
they are called mustangs. they are the American wild horses. Australian wild horses are called brumbys.
American wild horses are generally called mustangs.
wild horses are called "mustangs" and yes, they a re wild
A mob of brumbies. In New Zealand they are called kaimanawa wild horses.
A young female, not yet mature (under 4 years old) is called a filly. A female older than 4 is called a mare.
In the US they are called Mustangs. In Australia, brumbies, and in New Zealand kaimanawa wild horses.
There are far more female wild horses and burros than there are male. Many studies have taken place to find out why.
All mustangs are free roaming horses, so in a sense, they are wild, but because they are descendants from domesticated horses that the Spanish brought over they are not wild horses, they are called feral horses.
A herd
A group of wild horses can be called a field, a herd, a set and also a remuda.
Female horses are called mares, female foals are called fillies.
Female horses are called a mare. Male horses are stallions.