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Animal Detail ViewՄանրամասն` նրանց մասին

28.02.2012

Onager (Equus hemionus kulan)


Scientific classification

Kingdom: Animalia

Phylum: Chordata

Class: Mammalia

Order: Perissodactyla

Family: Equidae

Genus: Equus

Subgenus: Asinus

Species: E. hemionus

 

Description 

Onagers have a pale sandy-red colored coat with a light brown dorsal stripe. The dorsal stripe has two surrounding white strips that blend into the lighter colored hind quarters. In addition to the dorsal stripe, onagers also have a shoulder stripe. The flanks, back and underside of onagers are white. In the winter, the coat grows longer and turns grayer and the white parts become more defined. Males and females differ only slightly outwardly, with males being only slightly larger. Males stand 1.5 meters at the shoulder and are about 2 meters in length, weighing about 250 kilograms.

Range and Habitat

Onagers are found from Mongolia to Saudi Arabia and as far north as southern Russia and Kazakhstan. Some also inhabit northwestern India and Tibet. They have been reintroduced in Mongolia and Iran. Onager inhabits flat steppe, semi-desert or desert and is always found within 30 km of a source of water.

Behavior

Equus hemionus onager usually lives in herds, with the exception of older stallions, who can be found living alone. Mares live with their foals in herds made up entirely of other females and young. In E. hemionus, average herds contain between 10 and 20 animals, with one male and many females. However, in some ecological conditions, pressure from predators causes small single male groups to come together.

Equus hemionus is able to reach top speeds of about 70 km/hour, and can run at a sustained speed of 50 km/hour. It is likely that onagers are similar in their ability to attain such speeds.

Diet

Onagers are herbivores that feed on the scarce plant life in the desert. Foods of these animals include grasses, bushes, herbs and foliage. Onagers receive most of their water from their food, but must remain close to a site of open water. Grazing time for onager sis usually during the cooler part of the day such as morning and evening.

Reproduction

Breeding is seasonal, the gestation period in this species is 11 months, and most births occur from April to September. Females with young tend to form groups of up to five females. Males have been observed holding harems of females, but in other studies they defend territories that attract females. It is likely that differences in behavior and social structure are the result of changes in climate, vegetation cover, predation and hunting. In Mongolia alone, the wild ass seems to adopt harem type social groups in the southwest and territorial based social groups in the south and southeast. However, further research is needed to properly understand the dynamics underlying the social behavior of this species.

Conservation Status

The species Listed in the IUCN Red List and evaluated as Endangered.

 



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