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Herpetology Notes, volume 13: 961-964 (2020) (published online on 26 November 2020)

The performance of survival: A death-feigning case in graeca Bedriaga, 1881 (: )

Apostolos Christopoulos1,*, Christos Kotselis2, and Theofanis Theofanopoulos3

The Anguis Linnaeus, 1758 (Squamata: anti-predator strategy known in both and Anguidae) comprises five of legless called vertebrates (Cassill et al., 2008; Humphreys and Ruxton, slow , that occur mainly in Europe and western 2018). It was widely reported in (Burghardt Asia. The Greek slow Anguis graeca Bedriaga, and Greene, 1988; Gregory et al., 2007; Vogel and 1881 is a Balkan endemic distributed in the southern Han-Yuen, 2010; Marques et al., 2013; Iiftime and countries of the peninsula (Uetz et al., 2020). In Greece, Iftime, 2014; Sannolo et al., 2014; Muscat et al., 2016; it occurs in many parts of the mainland; Peloponnese; Gomard, 2017; İğci et al., 2017; Golubović et al., 2019), Euboea and Kerkyra Islands (Jablonski et al., 2016). and less frequent in lizards being reported in several Similarly with A. fragilis, A. graeca prefers vegetated families worldwide, including Anelytropsidae (Torres- and humid , with refuges such as stones, leaf Cervantes et al., 2004), Mabuyidae (Ribeiro et al., litter and woody debris (Smith, 1990; Valakos et al., 2010), (Santos et al., 2010), 2008; Speybroeck et al., 2016). Slow worms have (Nunes et al., 2012), Scincidae (Patel et al., 2016; various predators: snakes, birds, frogs, toads, mammals Vergilov, 2017), (Machado-Filho (including domestic cats) (Smith, 1990; Fuke, 2011), et al., 2018; Mesquita et al., 2018). To the best of our while quite recently the large green lizards spp. knowledge, there is no mention of this behaviour in the were also added to the list (Vacher and Wendling, 2019; legless lizards of Anguidae family. The high rates of shed Christopoulos et al., 2020). tails found in the species A. fragilis suggest that these Antipredator traits and behaviours in evolved lizards may suffer a high risk of predation (Stumpel, to both avoid predation risk and to escape capture 1985; Vences, 1993). In addition, it has been found (Humphreys and Ruxton, 2018). Spraying the foe, that antipredator behaviour in the species is induced death-feigning, autohaemorrhaging, caudal autotomy by chemosensory predator recognition (Cabido et al., and blood squirting in Squamata are some of the wide 2004). Here we report another antipredator mechanism variety of behavioural and physiological mechanisms in the genus Anguis. used against predators (Sherbrooke and Middendorf On 16 June 2019 at approximately 15:40 h, at the end of III, 2001; Gregory et al., 2007; Bateman and Fleming, a herpetological survey in the western Othrys Mountain 2009; Santos et al., 2010; Iiftime and Iftime, 2014; İğci range (Fthiotida, Central Greece), we observed an et al., 2017; Humphreys and Ruxton, 2018; Bels and adult A. graeca which seemed to be healthy (total Russell, 2019; Golubović et al., 2019). Death-feigning, length 210 mm), crossing the road. The observation also known as thanatosis and tonic immobility is an point (33.4802oN, 43.2069oE; 742 m a.s.l.) is located in a semi-mountainous zone, SE of the village Palea Giannitsou, and the main consists of pubescent oak (Quercus pubescens) forest with small openings. The day was sunny and the temperature was 29 oC. We stopped, handled the legless , and as we laid it on 1 Department of Zoology and Marine Biology, Faculty of the ground at the edge of the forest, it began to perform Biology, National and Kapodistrian University of Athens, Panepistimioupolis, 15784 Athens, Greece. a -like death-feigning behaviour. We observed the 2 Diagora 24, 11636 Athens, Attika, Greece. whole behaviour carefully and took photographs (Fig. 3 Konstantinoupoleos 4, 35100 Lamia, Fthiotida, Greece. 1). At first, the was spinning around its * Corresponding author. E-mail: [email protected] body vigorously with contractions for one minute (Fig. 962 Apostolos Christopoulos et al.

Figure 1. (A–D) Sequence of death-feigning behaviour in Anguis graeca (adult individual from the western Othrys Mountain); (E) The adult A. graeca in normal standing position, before it left. Photos by Apostolos Christopoulos.

1A,B). In a second phase, it stayed in tonic immobility standing position and remained in immobility for in inverted position for approx. 1.5 minutes (Fig. 1C). approx. two minutes (Fig. 1E). Finally, the slow worm Then, it moved part of its body and kept standing moved slowly towards the forest and hid in the leaf almost in immobility in the same position, while the litter. This is the first reported record of death-feigning sliding motion was almost imperceptible; this behaviour behaviour in the Greek slow worm. lasted for two minutes (Fig. 1D). After this successful Caudal autotomy is the only known defensive short performance, the slow worm regained its normal mechanism of genus Anguis until now. Here we report The performance of survival: A death-feigning case in Anguis graeca 963 a case of death-feigning as a second antipredator (L., 1758) and Natrix tessellata (Laurenti, 1768) from Turkey. behaviour in a species of genus Anguis. Furthermore, A. Commagene Journal of Biology 1(1): 63–64. graeca is a poorly studied species, thus many biological Iiftime, A., Iftime, O. (2014): Thanatosis and autohaemorrhaging in the Aesculapian Snake Zamenis longissimus (Laurenti, 1768). and ecological aspects remain unknown. Every natural Herpetozoa 26(3/4): 173–174. history note about the Greek slow worm’s life is Jablonski, D., Jandzik, D., Mikulíček, P., Džukić, G., Ljubisavljević, important so that we get to know more about its cryptic K., Tzankov, N., et al. (2016): Contrasting evolutionary life traits. histories of the legless lizards slow worms (Anguis) shaped by the topography of the Balkan Peninsula. BioMed Central Acknowledgements. We thank Petros Lymberakis (Natural History Evolutionary Biology 16(1): 99. Museum of Crete, University of Crete) for the pre-peer review of Machado-Filho, P.R., Moya, G.M., Maffei, F. 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Accepted by Florina Stanescu