Some scientists suppose the Dauria steppes the most ancient on the Earth and once spread to the territory of present-day Yakutia, where you will see steppes similar to Daurian ones on the southern side of hills. Vegetation communities that have formed in Dauria are unique, rich in endemics and, unlike other steppe regions of the planet, have mostly preserved their pristine state. Different types of real and meadow steppes are recognized here with vegetation communities characteristic only for Dauria (among their number – tansy (Tanacetum or Filifolium) steppes, shrub communities with Siberian apricot (Armeniaca sibirica) and elm (Ulmus) and others).

Herb and filifolium steppes of the north and east Dauria, alternated by endemic pine forests formed by Krylov pine and rare aspen-birch groves change to the south in dry grass and rocky steppes, which in its turn causes alternation of wildlife.

Abundance of small salt lakes rich in food attracts to Dauria millions of birds migrating along the East Asia -Australia and East Asia India flyways. The birds stop for rest here and many of them for nesting. Moreover, in the Torey hollow migration route of many bird species is narrowed, it is the so-called «bottleneck». It is because of the fact that it is in the north Dauria where a thin stripe of rich in water bodies and food steppes comes into mountain forest zone poor in lakes and wetlands. So, in spring in the Torey lakes hollow stop approximately half of all Gray plovers and Lesser Golden plovers migrating along the East Asia Australia flyway. The total number of migrants comes to three million individuals in spring and to six million in fall.

Almost 360 bird species including representatives of mountain-taiga and tundra complexes stop in Dauria during their flight or nest, 25 species of them are put into IUCN Red Data List as globally vulnerable or endangered. Among them 4 species of cranes (Siberian crane, Japanese crane, White-naped crane and Hooded crane), Great Bustard, Swan Goose, Baer“s Pochard, Baikal Teal, Relict Gull, Asiatic Dowitcher. For many species Daurian steppes are key habitats.

Dauria grass sea is not only birds’ realm. In recent past khulans, Przhewalski's wild horse, Argali inhabited this area or were common here. Now in the steppe herds of thousands dzerens or Mongolian gazelles, most numerous in Eurasia, are still found. 98% animals of this species (about 980 thousand) live here. More than 50 mammal species inhabit this region, among them Wild Cat Manul, Siberian Marmot, Daurian hedgehog, Daurian and Manchurian tsokor and many others. For many of them Dauria also remains a key or an only habitat.

In 2000 World Wildlife Fund included Dauria steppes into 200 ecoregions of the planet, which have special importance for conserving life on the Earth. However, it is possible to preserve unique ecosystems only by joint efforts of many countries, first of all of those on which territory this ecoregion is located.