关键词: 分布, 蒙古野驴, 西藏野驴, 野马

Abstract: Asinus h .hemionus：It is distributed at northwestern corner of Inner Mongo1ia and Gansu as well as in an area stretching from northeast of Xinjiang to west of Zhungaer Basin，covering about 140,000 Km² = (N.4o°20′- 46°40′,E.85° 40 ′-l07°3O′ )．According to the aeria1 survey in 1982．there were 358 wild asses in the Nature Reserve of Kalameili Mt．with the density of 0.02 ass／Km²． The survey in 1986 showed that the density reached 0．03 ass／Km² ．In the last few ten years，its distribution region has
been reducing continuously with population going down rapidly．Now ，we estimate that the population is not more than 2.000 in China．
Asinus kiang:A.k.kiang is distributed in west of Tibat and theM ts.on the southern verge of Xinjiand；A.k.holdereri in Qinghai except the vally of Huangshuiriver,northwestern corner Sichuan and east of Qilian shan Mt.in Gansu,covering about 1,500,000 Km²．(N.28°30 ′-39°20′,E.75°15′ -1O3°00′ )．According to the survey
vet 1984.there were 41,962 wild asses in the Nature Reserve of Aerjin Mts.with the density of 0. 917 ass／Km^2.The range is still very wide and the population is larger about over 200,000 estimated．
Equus przewalskii：We have notseen Wild horse．though we havesurveyed it for years．OnIy a few wild horses survive possibly in the east of Beitashan Mt.,covering about 10,000 Km² (N .4 4°44 ′- 45°。l3 ′,E.91° 46 ′-03°50′ )．

Key words: Distribution, Kulan, Asinus hemionus, Kiang, Asinus kiang, Wild horse, Equus przewalskii