The Jack Russell Terrier is a small, principally white-bodied, smooth-, broken-, or rough-coated  ..The name "Jack Russell" has been used over the years to describe a wide array of small white terriers, but now after a drawn out legal battle the JRTCA (Jack Russell Terrier Club of America) and its affiliates have won the exclusive rights to use the name Jack Russell Terrier in the USA to describe their particular variant of the dog.