Alpacas are similar to an animal called a llama and usually people mistake the two.
I like alpacas a lot!  They're from Peru and Bolivia.  Their wool makes great blankets.
Alpacas similar closely and can successfully cross breed.
I wonder if a cross-bred llama and alpaca have a different name?  Like a donkey does?
Alpaca
The alpaca ("Vicugna pacos") is a species of South American camelid. It is similar to, and often confused with, the llama. However, alpacas are often noticeably smaller than llamas. The two animals are closely related and can successfully cross-breed. Alpacas and llamas are also closely related to the vicuña, which is believed to be the alpaca's wild ancestor, and to the guanaco. 
There are two breeds of alpaca: the Suri alpaca and the Huacaya alpaca.
Alpacas are
Due to the successful manufacture of various alpaca cloths by Sir Titus Salt and other Bradford manufacturers, a great demand for alpaca wool arose, which could not be met by the native product. Apparently, the number of alpacas available never increased appreciably. Unsuccessful attempts were made to acclimatize alpaca in England, on the European continent and in Australia, and even to cross English breeds of sheep with alpaca. There is a cross between alpaca and llama—a true hybrid in every sense—producing a material placed upon the Liverpool market