Conspectus of the ornithological fauna of the USSR (ISBN 5-02-005300-7) is a 1991 Russian language publication by ornithologist L. S. Stepanyan.
It contains a list of bird species recorded from the former Soviet Union, together with details of their distribution, taxonomic relationships and subspecies.
Taxonomic changes
The following is a list of the species splits & lumps proposed by Stepanyan:
References
Conspectus of the ornithological fauna of the USSR Wikipedia(Text) CC BY-SA