Height. 10-12 in. Life Span. 12-14 years. 1. Key Characteristics of Russell Terriers. The high-energy Russell Terrier, with its longer body and shorter legs, is not to be confused with the similar-looking Parson Russell Terrier or the JRTCA Jack Russell Terrier, which are separate breeds. One big difference between the breeds is the dogs’ height.
The Jack Russell Terrier is a small dog with a short frame that weighs 11 – 17 pounds. They are compact and quick, but can also become overweight if not managed properly. The Parson Russell Terrier has a similar body size as the Jack Russell Terrier, but it is usually heavier at 13 – 17 pounds.
A thick double coat which serves as protection. Generally white with brown and black spots. Small ears that are triangular. One of the most favored characteristics of the spunky Jack Russell Terrier is its almond-shaped eyes that shine with life and excitement. The average lifespan is around fifteen years.
The Jack Russell Terrier breed was founded in the mid-1800’s in Devonshire, England by a clergyman named Parson John (Jack) Russell. Like many of his countrymen, the Reverend Russell had a passion for fox hunting. The Jack Russell Terrier was originally bred not to kill the fox, but to cause it to run from XtHt2.