Besides Mohair and Alpaca, some artists uses Sythethic Fur also know as Faux Fur on their creation. Most artists are no longer using real animal fur (eg. mink, fox, rabbit etc) because we care and want to put an end to animal extinction. I also know that some artists get these fur from recycle jackets/coats to create life-like bears.
Most Miniature Artists are using shorter pile fur such as cashmere, rayon, viscose, plush and sassy fabric etc. I have not tried most of them but have a few bears in my collection that are made using these material.
I hope you have a better understanding on the fur we use and I know one day I am going to try miniature fabrics and perhaps recycled mink fur =)