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A comparative assessment of morphological features of erythrocytes Pelophylax ridibundus (Pallas, 1771) and Bufotes viridis (Laurenti, 1768) living near the territory sprayed with pesticides was carried out. Multidirectional changes in the parameters of erythrocytes in the compared species were revealed, expressed in an increase in the width, area and volume of cells in P. ridibundus and a decrease in the values of these parameters in B. viridis.

The helminth community of the Green toad Bufotes viridis (Laurenti, 1768) from the population inhabiting the Caspian basin on the territory of the Republic of Dagestan is characterized. The study was carried out according to the method of full helminthological autopsy. Six species of helminths belonging to two types have been registered: Nematoda (4) and Acanthocephala (2).

The article analyzes the modern distribution of reptiles in Northwestern Turkmenistan. According to literary data and observations of the authors, 36 species of reptiles have been recorded in the region, including one new species Alsophylax sp. Two species (Eryx elegans and Trachylepis septemtaeniata transcaucasica) are excluded from the list of herpetofauna of the region.

Previously unknown biographical data about A. M. Nikolsky (1858–1942), R. D. Dzhafarov (1883–1971) and M. K. Ozol (1902–1973) are given. The main information was obtained from the Central State Historical Archive of St. Petersburg, the Russian State Historical Archive and the Central Archive of the Ministry of Defense.

A detailed morphological description of the Elaphe dione (Pallas, 1773) in the Samara region is given. In wild-caught adult specimens that were not in a state of molting (n = 119), three variants of belly coloration were identified: beige (47.0%), ginger (26.9%), and gray (26.1%). Among individuals with beige and ginger bellies predominated males (67.9% and 59.4%, respectively), and females with gray bellies predominated (54.8%). The first case of partial melanism in the region was registered. The maximum L.corp.

The article is based on materials on age-related changes in the color of the lower surface of the tail and back of the thighs in the population of the Rapid racerunner (Eremias velox velox Pallas, 1771), living on the Sarykum sandy massif. The material was collected in the first ten days of May 2023. A total of 110 individuals were caught and described: 44 males, 36 females and 30 immature individuals. The size characteristics of sex and age groups are given.

In the eastern part of the South Urals, the marsh frog, Pelophylax ridibundus (Pallas, 1771) is distributed in the rivers of Volga and Ob’ basins, floodplain and off-floodplain reservoirs. We found 17 new locations for the species. For the first time we noted the species in Ilmenskoe Lake, on the territory of the National Park “Taganaj”, and in the Miass River basin in the Uchalinskij Region of the Republic of Bashkortostan and in the surroundings of the selo Ustinovo in Chelyabinsk region.

Data on the distribution of the common smooth snake in Dagestan are presented. The map with the locations of the smooth snake includes 103 locations of the species. The issues of biotopic confinement and ecology of the species in the region are discussed.