Mamushis, or Asian moccasins, are heavy bodied pit vipers from Asia. Little resarch has been done on the venoms of these snakes, with the exception of G. blomhoffii. Thus, venom strength is largely a guess based on that of G. blomhoffii and the general lack of recorded human fatalities.
A number of species are listed below. The defualt species in the main table is the Japanese mamushi.
| Species | Typical venom | Size | Range | Habitat | Notes | ||
| Potency | Type | Typical | Maximum | ||||
| Japansese mamushi, G. blomhoffii | medium | hemo 10 necro 10 algesic 10 neuro 5 | 200 g | 1 kg | Japan, Korea, China. | Swamps, marshes, meadows, woodland, rocky slopes and outcrops. | The most common snake in Japan. Responsible for thousands of bites and several fatalities annually. |
| Siberian pit viper, G. halys | medium | hemo 10 necro 10 algesic 10 neuro 5 | 30 g | 50 g | Ural mountains through Siberia, Iran, Mongolia to China. | Steppe, valleys, mountain slopes, woodland. | The only pit viper to enter Europe. |
| Himalayan pit viper, G. himalayanus | medium | hemo 10 necro 10 algesic 10 | 30 g | 50 g | Southern slopes of the Himalayas. | Highlands, amid rocks, crevices, ledges, leaves, or fallen timber. | |
| Intermediate mamushi, G. intermedius | medium | hemo 10 necro 10 algesic 10 neuro 5 | 50 g | 100 g | Central Asia. | Rocky grassland, scrub, open woodland. | |
| Rock mamushi, G. saxatilis | medium | hemo 10 necro 10 algesic 10 neuro 5 | 100 g | 200 g | Amur region of Siberia and China, Korea. | Rocky mountain slopes, forest edges, stream banks. | |
| Tibetan pit viper, G. strauchi | medium | hemo 10 necro 10 algesic 10 | 30 g | 50 g | Tibetan Plateau; Tsinghai and Szechwan provinces of China. | Rocky mountain slopes, open woodland, grass, scrub. | |
| Ussuri mamushi, G. ussuriensis | medium | hemo 10 necro 10 algesic 10 neuro 5 | 50 g | 100 g | East Russia, northeast China, Korea. | Low mountains, rocky hills, fields, forest edges, marshes, stream banks. | |