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      Crepuscular and nocturnal activity of the Nose-horned viper, Vipera ammodytes (Linnaeus, 1758) is more common than previously reported

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      Herpetozoa

      Pensoft Publishers

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          Abstract

          Different snake species may be active at various times of the day. In Europe, most snake species are predominantly diurnal, but about a third are partially or principally crepuscular and/or nocturnal. Here, we report the first instance of multiple in situ observations of the crepuscular and nocturnal activity of V. ammodytes in Bulgaria. Overall, usually as a result of general herpetological surveys and chance observations between 2001–2020, we recorded crepuscular/nocturnal activity of twenty-seven individuals from both sexes and all age classes (juvenile to adult), observed from April to September, following warm (maximum daily Tair = 20–28 °C) and hot (Tair > 28 °C) days. These records represent less than 1.5% of all our personal viper observations. However, given that our observations occurred throughout the country, within five different climatic zones, we hypothesise that nocturnal activity of V. ammodytes is more common than previously reported.

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          Most cited references 13

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          Sexual dimorphism of the Sand viper (Vipera ammodytes L.) from the central part of Balkan Peninsula.

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            An observation of nocturnal activity in a Central-Italian Asp (Vipera aspis francisciredi).

             Mattea (2020)
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              Die Europäische Hornotter Vipera ammodytes (Linnaeus, 1758), Teil 1: Systematik, Ökologie und Lebensweise.

               Schweiger (1992)
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                Author and article information

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                Journal
                Herpetozoa
                Herpetozoa
                Pensoft Publishers
                2682-955X
                1013-4425
                September 30 2020
                September 30 2020
                : 33
                : 165-169
                Article
                10.3897/herpetozoa.33.e56520
                © 2020

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