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 Soviert Union, together with details of their distribution, taxonomic relationships and subspecies.
The following is a list of the species splits & lumps proposed by Stepanyan: