The prairie marmot belongs to the temperate arid type in eastern Mongolia, and lives in the marginal zone where the typical grassland, meadow grassland, desert grassland and arid grassland meet. I like to eat Cyperaceae and Gramineae plants, especially the leaves and stems of dewy young grass. According to the anatomical analysis of the stomachs of 40 otters by Inner Mongolia Institute of Epidemiology in 1970s, there was no other ingredient except green chyme. Under natural conditions, marmots don't eat any artificial bait. However, under the feeding conditions, it can be gradually trained to eat ordinary plant feed. Day and night activities, the frequency and distance of activities are related to climate. With the decrease of temperature, the moving distance decreases obviously. Marmots are social animals, and there are many otters in a hole. Before the adult otters come out of the hole, they usually look for a while on the mound at the mouth of the cave, and then the young otters come out of the hole one after another. After coming out of the hole, there are always 1 adult otters outside the hole, with their hind legs upright and looking around. When disturbed, they immediately issued an alarm to let the woodchucks outside the hole drill into the hole to hide. After the abnormality is eliminated, the alarm will sound again. Adult otters have a certain ability to resist enemies, and they can bite with natural enemies and rescue "family" members. There are few holes in the storm. Marmot caves can be divided into three types: wintering caves, summer caves and temporary caves. The wintering cave is a long-term dwelling cave with complex structure. A complete cave system has more than 5 ~ 10 caves. There are "observation platforms" (mounds) formed by floating soil between the tunnels, and the tunnels are criss-crossed. The nest is located at the intersection of tunnels in depth, with a distance of1/kloc-0 ~ 300 cm from the ground. Summer caves are often the new homes of hibernating young otters before and after sexual maturity, and their structures are relatively simple. The temporary cave is the simplest, and it is a refuge for marmots to dig away from the cave system (50 ~ 100 m). From the distance between cave systems, it can be seen that the activity range of a "family" is 1/4 ~ 1/2ha, but the boundary of feeding nest area is not strict, and different "families" can enjoy it. Marmots are hibernating animals. After the autumnal equinox, marmots in Inner Mongolia grassland began to sting people. They blocked most of the holes with gravel and soil, leaving only one hole in and out. During this period, it is rare to see a lot of marmot activities, and only a few individuals bite fresh grass into the hole. Before and after the cold dew, the hole was blocked by dung and mud and entered hibernation. If you are disturbed during hibernation, you can still wake up until the next April.