Ethnic identity was present rather "implicitly", i.e. when local autochthonous inhabitants were opposed to alien peoples (Chinese, Manchus, Koreans, etc.).

For the first time, a common ethnonym for the Udeges, Orochs and Taz was given by Jean-François de Laperouse by the common ethnonym Orochons (French: les orotchys) for the indigenous population living along the coast of the Tatar Strait and the Sea of Japan, namely in the Gulf of De-Kastri in 1787 in time of his round-the-world trip.

For the first time, such a division can be found in the works of Arseniev V. K. Udege is a highly endangered Manchu-Tungusic language spoken in the southern part of Russian Far East.

[9] In the 1930s, the Udege were forcibly made sedentary: each areal group was settled in a specially built permanent settlement: Kukan (Kur-Urmi Udihe), Bira (Anyuy), Kun (Hungari), Agzu (Samarga), Gvasyugi [ru] (Khor), Syain, Mitahheza and Olon [ru] (Bikin), Sanchikheza (Iman).

In the 1950s, a system of boarding schools for Udege children took shape, which finally broke the continuity of generations and oriented young people on speedy Russification.

The territorial groups are mostly named after the corresponding rivers: (1) Kur-Urmi, (2) Samarga, (3) Anyuy, (4) Khungari, (5) Khor, (6) Bikin, (7) Iman, and (8) Sea shore (Namunka).

Actually, the Udege continuum is divided along the “north-south” line, relating to all levels: phonetics and phonology, morphology and vocabulary, syntax.

Instead, the Cyrillic alphabet was formally introduced as part of a general campaign, but de facto the Udege language became unwritten until the 1980s.

In the late 80s, two literary languages began to form in the Udege language: - one for the northern group based on the Khor dialect (Simonov-Kulyandziga alphabet; "Khabarovsk"); - the second for the southern group based on the Bikin dialect (the alphabet of Perekhvalskaya; "Leningrad" / "Petersburg").

Experimental studies have shown that in the northern dialects glottalized vowels are interrupted by a bow, therefore they are called "discontinuous".

Evgeny Schneider [ru], an Udige language author and translator was declared an enemy of the people and executed.