Taxonomic revision of the Siberian accentor Prunella montanella (Pallas, 1776) (Aves: Prunellidae)

We revised the taxonomy of the Siberian Accentor Prunella montanella based on 338 museum specimens. We distinguish four subspecies, as follows: Prunella montanella montanella (Pallas, 1776) (north-western form), P. m. badia Portenko, 1929 (north-eastern form), P. m. gebleri n. ssp. (south-western form), and P. m. loskoti n. ssp. (south-eastern form). We describe two new subspecies: P. m. gebleri n. ssp. from the Altai-Sayan region, and P. m. loskoti n. ssp. from the mountain systems of the Stanovoy Range and southern Far East.