During natural disasters on the border of Holocene and Neocene there have been significant changes in the fauna of herbivorous mammals. The majority of ungulate species have become extinct, especially larger species. In addition, the size of many large ungulates has been eroded in the era of unrestrained human hunting and habitat destruction. As a result, most of the Neocene hoofed ecological niches in the Old World have taken shifty descendants lagomorphs - harelope. Characteristic for Eurasian saiga successfully evolved saiga antelope , but it happened in Central Asia, and in Tryokhrechye these antelopes left. Therefore, there appeared Three Rivers Land harelope - a special kind of herbivores adapted to the conditions of life in the steppes, and occupying the ecological niche running herbivores. This animal is very fragile build, like a gazelle. Their height at withers of about one meter and a weight of about 50 kg. According to the structure, they are similar to most of the species harelopes, became the main inhabitants of open spaces and forests of Eurasia and North Africa. The most closely related species - forest harelope (L. sylvatica). Like her Three Rivers Land harelope can change the coat color in winter.
Summer coat color of this animal striped: the general background of grayish-brown on it are narrow vertical gray bars. White tail of the animal is to signal: in case of alarm the animal picks it up. Winter coat of the animal is white and becomes thicker: in winter is cold enough, and often snows, although he holds no more than one - two months. In southern Tryokhrechye it may not be, but the animals still regularly change color for winter.
Three Rivers Land harelope are sociable herd animals they form large flocks numbering up to 100 head or more. These animals are a favorite prey for many predators, so it is vital to stick together. The herd does not remain long in one place, so as not to deplete the food resources.
Three Rivers Land harelope feeds mainly cereals, and is found in relatively dry areas of the steppe. She avoids swampy places, because her legs are very thin and the animal falls easily into the soft soil.
Ghosn at Three Rivers Land harelope begins in the fall, just before the autumn moult. The male gathers a harem of 4 - 5 females, and for about a week guarding them from competitors. At the same time they make abrupt barking sounds, and fight with each other, kicking (this is a unique case in the family: Other harelope fighting front legs). When the readiness of females to mate disappears herd again it turns into a lot of animals without a leader.
The female gives birth in early spring two cubs. They sighted, developed quickly learn to walk, and within three hours after birth are able to follow the herd. Usually, childbirth occurs early in the morning, and most of the females are allowed to herd the burden for two - three days.
Young harelope can produce offspring at the age of two. Life expectancy - about 15 years.