How to Differentiate Between a Donkey, Horse, and a Mule

The Equidae family has a genus Equus that includes the horse (Equus ferus caballus), the donkey (Equus africanus asinus), and the zebra (Equus quagga). While the zebra is easy to spot by its stripes, the other two look quite similar. But there is a clear difference in their size, nature, and endurance levels.

The crossbreed of a horse and a donkey is a mule. All three four-legged species have long ears and faces, a long back, and a tail. Their coats are also similar in look and texture.

Telling the three apart (horse, donkey, and mule) in detail may seem like a job for an expert. But it is really just a matter of a few traits that set them apart.

History

Horse, The horse we see today has gone through about 40-55 million years of evolution. Its domestication started around 4,000 BCE. Back then, it was used for travel, warfare, and hunting. Today, the horse is used for sports, fun rides, and cultural ceremonies. It is rarely used for carrying heavy loads.

Donkey, Its domestication can be traced back to roughly 3,000 BCE. Since then, it has been used as a draught animal in developing countries.

Mule, Its exact origin and history are still disputed today. Safe guesses can be made based on the history of its parents. It is often used for traveling and carrying loads in rugged terrains.

Appearance

Horse, It is spectacular with its shiny coat. Compared to donkeys and mules, it has a longer face, shorter ears, small rounded eyes, a lush mane and tail, and a curved back shaped to hold a saddle. Its hooves are also bigger than a donkey's.

Donkey, The word burro in Spanish means donkey. Compared to a horse, it has a shorter face and mane, wider eyes, thin limbs, and narrow hooves. Its ears are longer and marked by a darkening at their base and tip.

Mule, A "jack" (male donkey) and a "mare" (female horse) when crossbred produce a mule. A "stallion" (male horse) and a "jenny" (female donkey) produce a "hinny." The mule has both a long face and long ears. It has harder hooves and is sturdier than a horse. Its muscles look smoother compared to a horse's.

Natural Traits

Horse, Social by nature, it prefers to move around in herds and form harems. It is very responsive and active, with a body language that leans toward a fight or flight tendency.

Donkey, It is usually found wandering alone and later ending up in pairs. It is known for being stubborn, which really comes from self-preservation, unlike horses, which react first and think later.

Mule, It keeps the best qualities of both parents: patience, sure-footedness, stubbornness, and intelligence. It can carry a dead weight (still and non-living load) of up to 20% of its total body weight, and a live weight (such as a person) up to 30% of its total body weight.

Height and Weight

Horse, It is the tallest of the three. On average, its height is between 56-64 inches (142-163 cm).

Donkey, It is the shortest of the three. Its height ranges from 31-63 inches (90-180 cm), and its average weight is about 180-1,060 lbs.

Mule, Its weight ranges from 820-1,000 lbs. Its height depends on which of its parents it takes after more.

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Life Span

Horse, Its average lifespan is 25-30 years. In rare cases, it can live beyond 40.

Donkey, A well-fed donkey can live about 30-50 years. Lack of care may cut that down to just 12-15 years.

Mule, It can live for about 50 years.

Genetics

Horse, It has 64 chromosomes. Specific genes give its coat its wide range of colors.

Donkey, It has 62 chromosomes in total.

Mule, With an odd total of 63 chromosomes, it is usually sterile. In rare cases, where a female mule can carry a fetus, she is called a "molly" or "molly mule."

Frequently Asked Questions

What is the difference between a mule and a hinny?

A mule has a male donkey (jack) father and a female horse (mare) mother. A hinny has a male horse (stallion) father and a female donkey (jenny) mother.

How many chromosomes does a mule have?

A mule has 63 chromosomes, an odd number because the horse has 64 and the donkey has 62. This is why mules are usually sterile.

Which equine lives the longest?

A mule can live about 50 years. A well-cared-for donkey can also reach 30-50 years. A horse typically lives 25-30 years.

Coats

Horse, A horse's coat can come in many colors: chestnut, black, gray, bay, or pinto. White coats, which are rare, are actually gray coats that have faded with age.

Donkey, A donkey's coat is usually gray or dark brown. It often has a "Christian cross" marking, a dorsal stripe running from its mane to its tail, and a crosswise stripe across its shoulders.

Mule, A mule's coat can take after either parent, but it usually ends up brown or bay-colored.

A close look at these three species helps us spot features we might miss at first glance. It is remarkable that a mule inherits both coat textures from its parents, the donkey and the horse. It grows a donkey-like coat in summer and a horse-like coat in winter.

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