The Kennel Club recognises the Parson Russell Terrier which is
similar in appearance but slightly larger than the Jack Russell.
However, the name Jack Russell is applied to a number of different
types of similar small terriers, but due to the diversity amongst
these types it has proved difficult to come up with a single breed
Accordingly, the Jack Russell is not registered on the Kennel
Club Breed Register, but can be registered on the Kennel Club
Activities or Companion Registers.
Last updated - November 2013