Ado Birk was born in Kulbisaare farmstead,[1] Mõnnaste village, Tarvastu Parish, Kreis Fellin, Governorate of Livonia.

[3] An account detailed how he was recruited by the Soviet's department of intelligence (KRO) acting under a false flag.

[3] Birk became active in the Estonian Apostolic Orthodox Church (EAOC) from the second half of 1920s onward.

During World War II, soon after the Soviet Union invaded and occupied Estonia in June 1940, Birk was arrested by the Stalinist terror regime and, similarly to most other senior Estonian politicians at the time, was either executed or died in Soviet captivity soon afterwards.

On 23 January 1942, Birk was sentenced to death, without trial, by the Soviet Special Council of the NKVD.