The closest you will get would be a zebra from the Seringetti. The American Mustangs roam the western US and some of that terrain is deset-like. Both of these species are protected by law.
I find the desert and snow best but they are in most areas!
No you do not have to have your own horse to find a wild horse. Wild horses are not located on any main isle i.e. one with banks, general store's, etc. but if you walk around any other isle long enough you will find a wild horse.
go into the desert with it.
This depends on if your trying to buy one or just want to see one in the wild. If you are trying to buy one there are many wild horse associations and other wild horse rescues. Or if you are wanting to find some in the wild there are usually many in Wyoming.
in horse auctions or in the wild
You can mostly find camels in the jungle or in the desert.
I'v catched almost every horse I have on Desert Isle, also, just look at places it rarely is other people :)
The Criollo is found on Desert Terrain.
They can smell water from a distance.
some where in the wild if its a wild horse... other wise its a barn and its not a wild horse.......
Howrse.com is a great horse virtual horse website. You are not playing as wild horses but you do have a breeding farm and you can breed horses and have different breeds.
Morocco, the middle east, Arabia