Nikolai A. Formozov

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The ranges of the great tit Parus major and the Japanese tit P. minor overlap in the middle Amur region, where hybridization of these two species occur. These species have contacted for nearly a(More)
The macro- and microrelief of the surface of the digestive tract mucosa of two pika species—Pallas’s (Ochotona pallasi) and Daurian (O. dauurica)—were studied in detail using whole-mount preparations(More)
In four ground squirrel species from the Volga region—yellow (Spermophilus fulvus), russet (S. major), little (S. pygmaeus), and speckled (S. suslicus)—four hybridization variants (major/fulvus,(More)