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SMOOTH SNAKE CORONELLAAUSTRIACA (SERPENTES: COLUBRIDAE), A NEW SPECIES FOR THE OPHIDIOFAUNA IN THE ORENBURG STATE NATURE RESERVE (RUSSIA)
Andrey G. Bakiev1, Olga G. Kalmykova2, Roman A. Gorelov1
1 Institute of Ecology of the Volga River Basin of RAS, Russia e-mail: [email protected] 2Institute of Steppe, Ural Branch of RAS, Russia e-mail: [email protected]
Received: 29.03.2018
A report on the discovery of the smooth snake Coronella austriaca in the cluster area «Aytuarskaya steppe» of the Orenburg State Nature Reserve (Russia, Orenburg region, Kuvandykskiy district) on the 24 July 2017 is given. This is the first recording of the species for the Orenburg region on the left bank of the River Ural. The specimen was a pregnant female in molting state. The capture location (51°06.161'N, 57°41.853'E, 279 m a.s.l.) is at the top of a ridge with outcrops of bedrock occupied by rarefied petrophytic steppe plant communities. Among other reptiles inhabiting the location, only the lizard Lacerta agilis was registered, which is, presumably, the most frequent prey for the smooth snake.
Key words: Aytuarskaya steppe, habitat, new location, Orenburg region, Protected Area
The first record of the smooth snake Coronella austriaca within the current borders of the Orenburg region (one specimen, in the Karavaevskaya grove near Orenburg) was published by Zarudny (1896), who attributed the smooth snake to the extremely rare animals of the Orenburg region. In the late 20th century, the total number of this species in the Orenburg region approximately did not exceed 100-150 individuals (Chibilev, 1998). The species is included in the regional Red Data Book with the rarity status 3 (Decree of the Government, 2014). In the Ural, the smooth snake has the status of a rare, small-numbered and possibly endangered species (Vershinin, 2007).
According to previous studies (Chibilev, 1995, 1999, 2014) the Orenburg State Nature Reserve is inhabited by four species of snakes: the grass snake Natrix natrix (Linnaeus 1758), diced snake Natrix tessellata (Laurenti 1768), Dione snake Elaphe di-one (Pallas 1773), and the eastern steppe viper, also known as the Renard's viper Vipera renardi (Christoph 1861). The results of our research in 2017 have allowed us to supplement the ophidiofauna of the reserve with the smooth snake, Coronella austriaca (Laurenti 1768). This species is listed in the IUCN Red List (Crnobrnja Isailovic et al., 2009) under the Least Concern category, in Appendix II «Strictly protected fauna species» of the Bern Convention (Convention, 1979), threatened and/or protected in many countries (e.g., Santos et al., 2009; Jelic, 2010; Galarza et al., 2015; Sztencel-Jablonka et al., 2015).
On the 24 July 2017, at 4:50 p.m., a pregnant molting female smooth snake was found in the cluster area «Aytuarskaya steppe» of the Orenburg State Nature Reserve (Russia, Orenburg region, Kuvandykskiy district) (Fig. 1, 2).
«Aytuarskaya steppe», being the most mountainous area of the Orenburg State Nature Reserve and an analogue of the Huberlin Mountains, belongs to the riverside low hills. Almost the whole territory of this district is a system of deep mountain valleys laid mainly from south to north along a strike of folding and rock strata. The exceptions include the northernmost near-floodplain part of the River Ural and the Alimbet Plateau in the south. Most inter-valley watersheds of the area have the form of ridges complicated by saddles. These crests are composed of either conglomerates and breccias, or limestones (Chibilev, 1996).
The capture site of the smooth snake (51°06.161'N, 57°41.853'E, 279 m a.s.l.) is located at the inter-valleys watershed of the Zharyk and Sartkaragashta valleys. This is a ridge characterised by incompletely developed soils and their complexes with outcrops of bedrock on the tops and upper parts of the slopes.
The snake was captured at the top of a ridge occupied by rarefied petrophytic steppe plant communities with the presence of petrophytic forbs (e.g. Scorzonera austriaca Willd., Potentilla arenaria Borkh., Oxytropis floribunda (Pall.) DC.), grasses (Elytrigia pruinifera Nevski) and dwarf
subshrubs (Artemisia salsoloides Willd., Astragalus helmii Fisch.).
At the middle part of the slopes, following plant species were found: with the predomination of Stipa zalesskii Wilensky, significant participation of pet-rophytic species among the forbs, and sometimes with Artemisia marschalliana Spreng., A. salsoloides and shrubs (Spiraea hypericifolia L.) (Fig. 3).
The weight of the snake is 76.2 g, the length of the trunk with the head (L. corp. ) 520 mm, the length of the tail (L. cd.) 107 mm, the number of scales around the middle of the trunk (Sq.) 19, the number of ventral shields (Ventr.) 183, anal shield (A.) divided - 1/1, number of subcaudal shields (Scd.) -
51 pairs, number of upper labial shields (Lab.) to the right - 7, left - 7, number of temporal shields (Temp.) in the first and second rows to the right - 2 + 2, on the left - 2 + 3. The upper part of the body with a slightly noticeable characteristic pattern is painted in grayish-brown tones, the lower part in gray.
On the next day, 25th July, the smooth snake completed molting and was released at the place of capture. Among other reptiles inhabiting the location, only the lizards Lacerta agilis (Linnaeus 1758) were registered. Presumably, this species as well as other reptiles are the most frequent prey for the smooth snake, similarly to data of other authors (Spellerberg & Phelps, 1977; Luiselli et al., 1996; Drobenkov, 2000).
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«Aytuarskaya steppe» ' snake (Coronelía austriaca)
Fig. 1. Cluster area «Aytuarskaya steppe» of the Orenburg State Nature Reserve.
Fig. 2. Captured smooth snake (in a molting state).
Fig. 3. The habitat of the smooth snake.
The capture point is located at the southeastern periphery of the area (Bannikov et al., 1977; Debelo & Chibilev, 2013). In Russia, this is the closest point to the few locations of the species in Kazakhstan (Paraskiv, 1956; Dubrovsky, 1967). Comparing with the other records of the smooth snake in the Orenburg region (Zarudny, 1896; Lindholm, 1902; Polozhent-sev, 1935; Rajsky, 1951; Darkshevich, 1953; Chibilev, 1995, 1998; Bakiev et al., 1996) the current place of capture can be characterised as the most eastern, if considering only the left bank of the Ural within contemporary borders of the region as unique. According to local inhabitants, this «green snake» can be encountered in the vicinity of the protected area «Aytuarskaya steppe». Apparently, it is a smooth snake of a green morpha, known from the Kargalinskaya steppe (Lindholm, 1902) and the Trans-Urals (Vershinin, 2007).
References
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ОБЫКНОВЕННАЯ МЕДЯНКА CORONELLA AUSTRIACA (SERPENTES: COLUBRIDAE) - НОВЫЙ ВИД В ОФИДИОФАУНЕ ГОСУДАРСТВЕННОГО ПРИРОДНОГО ЗАПОВЕДНИКА «ОРЕНБУРГСКИЙ» (РОССИЯ)
А. Г. Бакиев1, О. Г. Калмыкова2, Р. А. Горелов1
1Институт экологии Волжского бассейна РАН, Россия e-mail: [email protected] 2Институт степи УрО РАН, Россия e-mail: [email protected]
Приведены сведения о находке обыкновенной медянки Coronella austriaca на участке «Айтуарская степь» заповедника «Оренбургский» (Россия, Оренбургская область, Кувандыкский район) 24 июля 2017 г. Это первая для Оренбургской области находка вида из Левобережья Урала. Беременная самка находилась в состоянии линьки. Место встречи (51°06.161' с.ш., 57°41.853' в.д., 279 м н.у.м.) расположено на вершине хребта с выходом коренных пород, занятой разреженными петрофитностепными растительными сообществами. Из других пресмыкающихся в биотопе встречены только прыткие ящерицы Lacerta agilis, которые относятся к основным объектам питания обыкновенной медянки.
Ключевые слова: Айтуарская степь, местообитание, новое местонахождение, ООПТ, Оренбургская область
