1. The Southern Part of Russian Far East and Korean Peninsula as a Transition Zone between the Boreal and Tropical Faunas of the Waterfleas (Cladocera, Crustacea)

   • P. G. Garibian
   • A. N. Neretina
   • N. N. Smirnov

   OriginalPaper 17 December 2021 Pages: 865 - 879

   

2. Specific and Genetic Structure of the Daphnia longispina s. l. Complex (Cladocera, Daphniidae) in Water Bodies of Southern Siberia

   • E. I. Zuykova
   • N. A. Bochkarev
   • A. A. Kotov

   OriginalPaper 17 December 2021 Pages: 880 - 891

   

3. Faunal Exchanges between the Basins of the Arctic Ocean and the Caspian Sea: Their History and Current Processes

   • A. A. Makhrov
   • M. V. Vinarski
   • I. N. Bolotov

   OriginalPaper 17 December 2021 Pages: 892 - 906

   

4. A New Trophic Relationship in the Baikal Ecosystem: The Pelagic Amphipod Macrohectopus branickii (Crustacea, Amphipoda) and the Bat Myotis petax (Mammalia, Chiroptera)

   • S. I. Didorenko
   • A. D. Botvinkin
   • V. V. Takhteev

   OriginalPaper 17 December 2021 Pages: 907 - 914

   

5. Peculiarities of the Evolutionary Process in Shrimp (Crustacea, Decapoda)

   • R. N. Burukovsky

   OriginalPaper 17 December 2021 Pages: 915 - 925

   

6. Cladocera and Copepoda of Montane Peatlands of the North Caucasus, Russia: Composition and Formation Patterns of Species Complexes

   • M. D. Aksenova
   • E. S. Chertoprud
   • Yu. A. Mazei

   OriginalPaper 17 December 2021 Pages: 926 - 933

   

7. Appearance of a New Species of Cladocera (Anomopoda, Chydoridae, Bosminidae) in the Hypersaline Moynaki Lake, Crimea

   • N. V. Shadrin
   • V. A. Yakovenko
   • E. V. Anufriieva

   OriginalPaper 17 December 2021 Pages: 934 - 937

8. Dynamics of the Species Structure of Testate Amoeba Assemblages in a Waterbody-to-Mire Succession in the Holocene: A Case Study of Mochulya Bog, Kaluga Oblast, Russia

   • A. N. Tsyganov
   • A. A. Komarov
   • Yu. A. Mazei

   OriginalPaper 17 December 2021 Pages: 938 - 949

   

9. Materials on the Fauna and Ecology of Rotifers in the Urals, Family Brachionidae (Rotifera, Eurotatoria, Ploima), Genera Kellicottia, Plationus, and Platyias

   • A. G. Rogozin

   OriginalPaper 17 December 2021 Pages: 950 - 958

   

10. Distribution of the Common Cockle Cerastoderma edule (Linnaeus 1758) (Molluska: Bivalvia) in the Littoral Zone of Levrier Bay, Mauritania

    • A. V. Gushchin
    • P. C. Goudswaard

    OriginalPaper 17 December 2021 Pages: 959 - 966

    

11. Crustaceans of the Aral Sea

    • N. V. Aladin
    • I. S. Plotnikov
    • A. V. Makrushin

    OriginalPaper 17 December 2021 Pages: 967 - 983

12. The Genus Heterocope Sars 1863 (Copepoda, Calanoida) in Russia: Morphology and Distribution

    • N. G. Sheveleva
    • V. N. Podshivalina
    • N. G. Bayanov

    OriginalPaper 17 December 2021 Pages: 984 - 1003

    

13. Body Size, Age, Phenetic, Morphophysiological, and Cytogenetic Characteristics of Pelophylax ridibundus (Amphibia, Ranidae) Populations Inhabiting Polluted Thermal Reservoirs of Kamchatka

    • E. B. Romanova
    • E. S. Ryabinina
    • S. M. Lyapkov

    OriginalPaper 17 December 2021 Pages: 1004 - 1016

    

14. Sex-Age Population Structure of the Multicolored Lizard (Eremias arguta deserti, Lacertidae) in Semi-Deserts of Astrakhan Region

    • G. V. Polynova
    • S. S. Mishustin
    • O. E. Polynova

    OriginalPaper 17 December 2021 Pages: 1017 - 1021

15. Cold Resistance and Wintering of the Common Viper (Vipera berus, Reptilia, Viperidae) on Kizhi Island, Karelia

    • D. I. Berman
    • N. A. Bulakhova
    • N. D. Ganyushina

    OriginalPaper 17 December 2021 Pages: 1022 - 1029

    

16. Seasonal Dynamics of the Bird Population of Omsk City

    • A. A. Odintseva
    • O. A. Odintsev

    OriginalPaper 17 December 2021 Pages: 1030 - 1040

    

17. Numbers and Seasonal Distribution of the Western Population of the King Eider (Somateria spectabilis): Monitoring Organization in the Northern Seas of Russia

    • Yu. V. Krasnov
    • A. V. Ezhov
    • A. A. Shavykin

    OriginalPaper 17 December 2021 Pages: 1041 - 1050

    

18. The Long-Legged Buzzard (Buteo rufinus, Accipitriformes, Accipitridae) Nesting in Artificial Forest Belts and Single Trees in the Clay Semidesert of the Trans-Volga Region

    • A. V. Bykov
    • O. A. Bukhareva

    OriginalPaper 17 December 2021 Pages: 1051 - 1060

    

19. Vilyuy Population of the Black-Tailed Godwit (Limosa limosa melanuroides, Charadriiformes, Scolopacidae)

    • V. G. Degtyarev
    • N. N. Egorov
    • M. A. Afanasiev

    OriginalPaper 17 December 2021 Pages: 1061 - 1066

    

20. Song Divergence in the Group of “Brownish” Chiffchaff Forms (Phylloscopus collybita sensu lato)

    • I. Yu. Il’ina
    • I. M. Marova
    • V. V. Ivanitskii

    OriginalPaper 17 December 2021 Pages: 1067 - 1074

    

21. Cases of Conspecific Brood Parasitism in the Willow Warbler (Phylloscopus trochilus, Passeriformes)

    • M. V. Matantseva
    • S. A. Simonov
    • N. V. Lapshin

    OriginalPaper 17 December 2021 Pages: 1075 - 1078

22. Sex and Age Determination of the Eurasian Coal Tit (Periparus ater, Passeriformes, Paridae) Using Anatomical and Morphological Characteristics of the Wing

    • M. G. Mitropolskiy

    OriginalPaper 17 December 2021 Pages: 1079 - 1083

    

23. Spatial Distribution of House Sparrow Nests (Passer domesticus, Passeriformes, Passeridae) in Western and Central Siberia

    • V. A. Yudkin
    • I. G. Frolov
    • E. S. Sleptsova

    OriginalPaper 17 December 2021 Pages: 1084 - 1093

    

24. A Comparative Analysis of the Reindeer (Rangifer tarandus), the Greater White-Fronted Goose (Anser albifrons), and the Brant Goose (Branta bernicla) Diets on Belyi and Shokalskii Islands (Yamalo-Nenets Autonomous Okrug)

    • S. B. Rozenfeld
    • I. S. Sheremetyev

    OriginalPaper 17 December 2021 Pages: 1094 - 1103

    

25. The First Record of the Greater Noctule Bat (Nyctalus lasiopterus) in the Southern Urals

    • V. P. Snit’ko
    • L. V. Snit’ko

    OriginalPaper 17 December 2021 Pages: 1104 - 1106

    

26. A Method for Counting and Identifying the Linear Sizes of Caspian Seals (Pusa caspica) on Rookeries Using Multicopters

    • M. T. Baimukanov
    • L. A. Zhdanko
    • A. M. Baimukanova

    OriginalPaper 17 December 2021 Pages: 1107 - 1113

    

27. Spatial Distribution and Age–Sex Structure of the Tur Population (Capra cylindricornis Blyth) in the East Caucasus

    • E. A. Babaev
    • Y. A. Yarovenko

    OriginalPaper 17 December 2021 Pages: 1114 - 1122

    

28. Effect of Ecological Factors on the Abundance of the Tarbagan (Marmota sibirica, Rodentia, Sciuridae) in Southwestern Transbaikalia

    • B. B. Badmaev

    OriginalPaper 17 December 2021 Pages: 1123 - 1130

    

29. Transition of Small Mammals from Live Elements of the Biocenoses to a Subfossil State

    • Yu. E. Kropacheva
    • N. G. Smirnov

    OriginalPaper 17 December 2021 Pages: 1131 - 1145

30. Small Mammals (Rodentia, Lagomorpha, Carnivora) of the Southern Trans-Urals in the Atlantic Period of the Holocene

    • E. A. Kuzmina
    • A. I. Ulitko

    OriginalPaper 17 December 2021 Pages: 1146 - 1150

31. Arboreal Behavior of the Red-Backed Vole of the Genus Myodes (Rodentia, Cricetidae) in the Northern European Taiga

    • A. A. Kalinin

    OriginalPaper 17 December 2021 Pages: 1151 - 1156