20,000 (Shearer and Sun 2002), decreasing. Eastern Ersu (Ersu) 13,000, Central Ersu (Duoxu) 10 or less, Western Ersu (Lizu) 4,000.
Sichuan province: Ganzi Tibetan autonomous prefecture, Jiulong county; Liangshan Yi autonomous prefecture, Ganluo, Mianning, Muli and Yuexi counties; Ya’an prefecture, Hanyuan and Shimian counties; all on lower Dadu river dispersed among Chinese, Tibetan, and Yi peoples.
7 (Shifting). Language of recognized nationality: Tibetan.
Ersu (Eastern Ersu), Duoxu (Central Ersu), Lisu (Liru, Lüzü, Western Ersu).
SOV; adjectives and number-classifier constructions follow noun heads; consonant cluster onsets; most morphemes monosyllabic; 2 tones, word-template zone.
Ersu Shaba Picture Writing [Qaag], used until some time before 2003, limited usage, used in religious ceremonies.