Danışman T. & Coşar İ. — A new species of the genus Leptonetela Kratochvil, 1978 (Araneae: Leptonetidae) from Turkey — 487-490 .PDF
Boyacı Y. O. & Gülle P. — Two new species of the genus Lebertia Neuman, 1880 (Acari: Hydrachnidia: Lebertiidae) from Western Anatolian Karstic Plateau, Turkey — 491-494 .PDF
Aybakır K. C., Arslan A. & Zima J. — A new chromosomal race and a hybrid form of Nannospalax xanthodon (Satunin, 1898) (Rodentia: Spalacidae) from Karaman, Turkey — 495-502 .PDF
Helvaci Z. & Çolak E. — New data on the taxonomy of the genus Apodemus Kaup, 1829 (Mammalia: Rodentia) in Turkey: a geometric morphometric approach — 503-509 .PDF
Teofilova T. M., Gradinarov D. P. & Kodzhabashev N. D. — The first record of the family Cerophytidae (Coleoptera) from Bulgaria: the rare saproxylic beetle Cerophytum elateroides (Latreille, 1804) in beech woodland in Sarnena Sredna Gora Mts. — 511-516 .PDF
Kalivodová М., Sládkovičová V. H., Raniak A., Kanka R. & Žiak D. — Communities of small terrestrial mammals of Western Slovakia wetlands within the Danube Basin — 517-523 .PDF
Kuang F., Li F., Gao S. & Wang Z. — Visual fields configuration and eye movements of a passeriform bird with a varying foraging behavior — 525-533 .PDF
Yanar O., Topkara E. F., Gönül Solmaz F. & Mercan S. — Effects of plant phenolic compounds and Bacillus thuringiensis subsp. kurstaki on immune responses and antioxidant enzyme activities of Hyphantria cunea (Drury, 1773) (Lepidoptera: Arctiidae) Larvae — 535-542 .PDF
Dundarova H., Michev B. & Pandourski I. — Bats over the western Black Sea open water area — 543-546 .PDF
Bu X., Xu Y., Wang J., Shrestha T. K., Wu J., Xiang R., Zhu Y., Zeng F., Sheng Y. & Meng X. — Summer habitat selection of wild boar Sus scrofa Linnaeus, 1758 (Mammalia: Suidae) in mountainous regions in Beijing, China — 547-556 .PDF
Varadinova E. D. & Fikova R. P. — Representativeness of monitoring sites for ecological status evaluation of water bodies: case study of Chetirka (Logodashka) River and its tributaries, SW Bulgaria — 557-563 .PDF
Gundogdu A., Harmantepe F. B., Karsli Z. & Dogan G. — Effect of ammonia at different PH values on survival of juveniles of Palaemon adspersus Rathke, 1837 (Decapoda: Palaemonidae) — 565-574 .PDF
Durmus T., Mazei Y. A. & Balkis-Ozdelice N. — Ecology of the testate amoeba Arcella discoides Ehrenberg, 1871 (Amoebozoa: Arcellinida) in the Büyükçekmece Reservoir, Turkey — 575-580 .PDF
Güçlü S. S. – Length-weight relationships and condition factors of five species of the genus Barbus Cuvier & Cloquet, 1816 (Actinopterygii: Cyprinidae) from Western Anatolia, Turkey — 581-586 .PDF
Kodzhabashev N. D., Tsvyatkova D. D., Krastev K. V., Ignatov M. M. & Teofilova T. M. — The Eurasian beaver Castor fiber Linnaeus, 1758 (Rodentia: Castoridae) is returning to Bulgaria — 587-595 .PDF
Dundarova H., Altybaev K., Mamatkalykov P., Momosheva G., Nizamiev A. & Sultanbek kyzy B. – Underground habitats as a unit for bat conservation in Southwestern Kyrgyzstan — 597-605 .PDF
Aydogdu A., Emre Y., Emre N. & Yabacı A. — Occurrence of Rhabdochona fortunatowi Dinnik, 1933 (Nematoda: Rhabdochonidae) in Two Endemic Cyprinid Species (Capoeta spp.) in Turkey — 607-612 .PDF
Shen L., Wang M., Hu J., Zhu Y., Li Y., Zhou M., Sheng Y., Zeng F. & Meng X. – Development of Stereotypical Behaviour in Captive Fawns of Alpine Musk Deer Moschus chrysogaster Hodgson, 1839 (Artiodactyla: Moschidae) — 613-620 .PDF
Lombardo A. & Marletta G. – Seasonality of the Alien Lamprohaminoea ovalis (Pease, 1868) (Gastropoda: Cephalaspidea) along the Central-eastern Coasts of Sicily, Central Mediterranean Sea — 621-628 .PDF
Özalp H. B., Ovalis P. & Culha M. — Occurrence of Two Non-indigenous Alien Sea Slugs, Bursatella leachii (Blainville, 1817) and Melibe viridis (Kelaart, 1858) (Gastropoda: Heterobranchia), from the Çanakkale Strait, Turkish Straits System — 629-632 .PDF
Dyugmedzhiev A. V., Andonov K. I. & Slavchev M. L. — Further insights on the nocturnal activity of the nose-horned viper Vipera ammodytes (Linnaeus, 1758) (Reptilia: Viperidae) in Bulgaria: first observation in October — 633-636 .PDF
Stefanov T. & Vasilev V. – First record of the violet dropwing Trithemis annulata (Palisot de Beauvois, 1807)
(Insecta: Odonata) in Bulgaria — 637-639 .PDF
Dedov I. K., Schneppat U. E. & Cornu R. – First record of a surviving and reproducing population of Cornu aspersum (O. F. Müller, 1774) (Gastropoda: Helicidae) in Bulgaria outside snail-farms — 641-643 .PDF
Michailova P. – Hubenov Z. 2021. Species Composition and Distribution of the Dipterans (Insecta: Diptera) in Bulgaria — 645-646 .PDF
Radkhah A. R. & Eagderi S. – Baldisserotto B., Urbinati E.C. & Cyrino J.E.P. (Eds.) 2020. Biology and Physiology of Freshwater Neotropical Fish — 647-648 .PDF