Amazingly, Gun-Galuut's vast and diverse landscape has tarditionally been a refuge for a rich and unique assemblage of animals, and it's combined from diversity of ecosystem although it owns comparatively small area. The harmonized complex of high mountains, steppes, rivers, lakes and wetlands as well are kept enough as its original state. Whoever visiting enjoys to see Gun-Galuut vast steppe seems to meet the sky, the imposing mountains Baits and Berkh, a home land of rare creatures, Ikh-Gun and Ayaga lakes, a paradise of birds, Kherlen, the longest river of Mongolia and Tsengiin Burd wetland, in where water and wetland birds lay their eggs.

Mountain Ranges
The area of Gun-Galuut Nature Reserve is elevated averagely 1200 m above sea level, topped by Mt. Baits and Berkh at the altitude of 1641 and 1631 m respectively, and are rocky. The area has several terrestrial ecosystems such as mountains, hills and steppes. Mt. Baits range locates in the center of the area, and Mt. Berkh locates at the south end of NR like stretching from north-west to south-east. The both of them has many species of fauna and flora.

The most interesting thing is the Mt. Baits has only one tree Larch. As for fauna, argali sheep, grey wolf, fox, lynx, manul cat, badger, hare, marmot, mice and etc.., White gazelles or the Procapra gutturosa often come from the east to this area. As for birds, Steppe Eagle /Aguile nipalensis/, Golden Eagle /Aguila chrysaetos/, Saker falcon /Falco cherrug/, Kestrel /falco tinnunculus/, Lesser Kestrel /Falco naumanni/, Upland Buzzard /Buteo hemilasius/, Long legged buzzard /Buteo lagopus/, Mongolian lark, Calandra lark, Crested lark, Horned lark, Thrushes, Pipits, Magpies and Hoopoes, Owls and Tawny-Owls.

Steppes
Gun-galuut Nature Reserve is in the westernmost part of the Great Mongolian Steppes. In steppe of the NR has Wetland Delberkhii, surroundings of Lake Ikh Gun and Ayaga at the north of the NR, basins of River Galuut and Kherlen. The wetland Delberkhii is the main water resource for Lake Ikh Gun and Ayaga, and other grounwater in Gun-Galuut NR. Also, since its soil fertility, plants, land characteristics and quality are pretty good, water birds and other biodiversities like to come here.

Lakes
Gun-Galuut Nature Reserve has numerous lakes and pools. The largest one in size are Lake Ikh-Gun (88 Sq.he) and Lake Ayaga (13 Sq.he). Most interestingly, Lake Ikh-Gun consists of 2 parts, 1 of which is sq.he and the other is 17 sq.he, and there’s a track between these 2 small parts, on which a vehicle can drive. These 2 lakes are situated at the northern part of tourism zone of the Nature Reserve. Many species of waterbirds spend summer at these 2 lakes, namely, gulls, ducks, geese, swans, cranes, storks etc., Lake Ayaga was mentioned by one of the well-known scientists of Mongolia, Dr. Dashdorj in one of his scientific articles as “ Lake Ayaga needs an immediate protection as it is a home for many species of worldwide endangered species of fish...”, in 1980s. Lake Ayaga is richer than the lake Ikh Gun in birdlife. There’s no outlet and inlet of Lake Ikh Gun, but Lake Ayaga has an outlet and an inlet.

Rivers
Gun-Galuut Nature reserve has many clear rivers including the River Kherlen, one of the longest in Mongolia, River Ayaga, River Shinebulag and River Galuutai and so on. All are rich in fish. River Ayaga flows from Lake Ayaga and joins the River Kherlen. Currently 38 species of fish are observed in the River Kherlen which flows from the Khentii Mountain range and joins Lake Dalai in Inner Mongolia. Fish species, Taimen (Hucho Taimen), Lenok (Brachymystax lenok), Amur pike (Esox reicherti), Burbot (Lota lota), Amur dase (Leuciscus waleski) and Flathead asp (Pseudaspius parva) and many more. The Nature Reserve is open for all 4 seasons with its rich fishery "Catch and Release" only, amazing nature beauty and wilderness. You have opportunities to fish for Taimen – The River King as the world class fishermen call it.

Wetlands
Ayaga wetland is a beautiful and rich wetland, a home for many species of animals and birds. The wetland is a wonderful complex of everything that a bird may need to live and breed. Many endangered and rare waterbirds also occur in Gun-Galuut, namely, Black Stork /Ciconia nigra/ is facing problems of extinction worldwide. It spends summers at Ayaga oasis of the NR peacefully.