Donkey

Donkey
Scientific classification
Kingdom Information
Domain	Eukaryota
Kingdom	Animalia
Subkingdom	Bilateria
Branch	Deuterostomia
Phylum Information
Phylum	Chordata
Sub-phylum	Vertebrata
Infraphylum	Gnathostomata
Class Information
Superclass	Tetrapoda
Class	Mammalia
Sub-class	Theriiformes
Infra-class	Holotheria
Order Information
Superorder	Preptotheria
Order	Perissodactyla
Sub-order	Hippomorpha
Family Information
Family	Equidae
Tribe Information
Tribe	Archipini
Genus Information
Genus	Equus
Species Information
Species	E. africanus asinus
Population statistics

The donkey (Equus africanus asinus) is a horse-like animal of the family Equidae, the domesticated form of the African wild ass (Equus africanus). First domesticated in the Nile Valley around 5000 B.C., they were among the first animals used as a beast of burden, a transport animal and an agricultural tool in the service of man to modern times. The donkey allowed the development of trade and the expansion of civilization over large areas, expanding from the Middle East to the Mediterranean basin to Europe, then to the Americas, performing at a lower cost the same functions as the horse.

Description

The donkey is similar in general build and appearance to the horse, but smaller and more robust, and with longer ears. They are 31 to 63 inches tall, and weigh from 180 to 1,060 pounds, with the size differences depending on the specific breed. The coat varies according to the breed but is generally gray to brownish-gray in color with white on the belly, the muzzle and around the eyes. Several breeds are predominantly black or brownish. A distinctive marking on most breeds is a black stripe down the length of the spine, and a single stripe on either side from the shoulder blades to the elbow.

In addition to the purely external differences to horses, donkeys have some peculiarities that are not recognizable at first glance. In contrast to horses, donkeys have five instead of six lumbar vertebrae, 31 pairs of chromosomes instead of 32, and a slightly lower body temperature, averaging 98.6° F instead of the usual 99.5 to 100.76° F in horses. The gestation period is also longer for donkeys, about 365 to 370 days compared to 330 days for horses. There are also significant differences in behavior: horses tend to flee in stressful situations, while donkeys tend to pause. Donkey mares often live alone with their foals in the mountains and an immediate escape is therefore not always possible without endangering the foal. Donkeys often stop dead in their tracks. Additional stress, for example from blows or screams, tends to increase this rigidity, which has lead, rather wrongfully, to the donkey's reputation as a particularly stubborn or stupid animal.

Range and habitat of feral animals

Feral donkeys are those animals which have escaped captivity and have thrived in the wild, especially in semi-arid and arid environments, and are found in many regions of the world. Approximately 1.5 million feral donkeys roam the interior of Australia, and another 6,000 animals live in the southwestern United States. These "burros" as they are called (after the Spanish word for "donkey") are protected as a historical symbol; however, a call has been made to cull their numbers as they have been said to compete for food and water with domestic range cattle and native bighorn sheep.