A leucistic Checkered Keelback, Fowlea piscator (Serpentes: Natricidae), from Mizoram, India

Albinism and leucism in free-ranging snakes rescued in Gujarat and Tamil Nadu, India

“…In Indian snakes, leucism and albinism have been reported previously in the Indian Rock Python (Python molurus), Spectacled Cobra (Naja naja), Russell's Viper (Daboia russelli), Common Trinket Snake (Coelagnathus helena helena), Common Kukri Snake (Oligodon arnensis), Common Sandboa (Eryx conicus), Red Sandboa (Eryx johnii), Green Keelback (Rhabdophis plumbicolor), Checkered Keelback (Fowlea piscator), Common Wolfsnake (Lycodon aulicus), Common Krait (Bungarus caeruleus), Lesser Black Krait (Bungarus lividus), and Indian Ratsnake (Ptyas mucosa) (Mallik et al 2009;Vyas 2009;Vyas et al 2012;Mahabal and Thakur 2014;Patel and Tank 2014;Adimallaiah and Vyas 2015;Thombre and Dhande 2015;Hussain et al 2016;Kumbar et al 2016;Lobo and Sreepada 2016;Narayana et al 2016;Chaudhuri et al 2018;Thakur and Trivedi 2018;Mohalik and Kar 2019;Ashaharraza et al 2020;Deshmukh et al 2020;Ray and Pandey 2020;Sawant and Parmar 2020;Choure et al 2021).…”

Necrocoitus in Common Bottlenose Dolphins (Tursiops truncatus) near Sarasota, Florida

“…Since the male dolphins in the cases presented here were presumably aware the females were dead, it is unlikely that they were reacting to perimortem pheromone expression, which has been posited as an explanation for necrocoitus in several taxa (Costa et al, 2010;Siqueira et al, 2015;Ashaharraza et al, 2020;Colombo & Mori, 2020), including Florida manatees, who occasionally pursue females to the point of exertional myopathy and death (Bills et al, 2013;Walsh & de Wit, 2015;Reynolds et al, 2018). This was investigated through ovary examination.…”

“…Necrocoitus (historically referred to as Davian behavior) has been reported in a variety of vertebrate and invertebrate species (Dickerman, 1960;Moeliker, 2001;Izzo et al, 2012;Ashaharraza et al, 2020;Wang & Meyer-Rochow, 2020). Several marine mammal species have been observed engaging in necrocoitus, including the Florida manatee (Trichechus manatus latirostris), the southern sea otter (Enhydra lutris nereis), the Pacific pilot whale (Globicephala scammonii), and the common bottlenose dolphin (Tursiops truncatus), which represents the majority of cetaceans who have been observed engaging in postmortem attentive behavior (Brown, 1962;Harris et al, 2010;Bills et al, 2013;Bearzi et al, 2018;Methion & Díaz López, 2021).…”

“…Necrocoitus has been documented in a wide array of species, though it is not common in any one species. Most observed instances of necrocoitus span reptiles, amphibians, and birds (e.g., How & Bull, 1998;Costa et al, 2010;Izzo et al, 2012;Tomita & Iwami, 2016;Swift & Marzluff, 2018;Ashaharraza et al, 2020). Dolphins are highly intelligent mammals with complex social systems (Marino, 2004;Connor, 2007;Wells, 2013) and are, therefore, unlikely to have the same motivating factors behind instances of necrocoitus as other taxa.…”

The first record of leucism in the Rhabdophis tigrinus (Boie, 1826) (Squamata, Colubridae) in South Korea

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Abnormal color variation on parts or over the entire body of animals has a variety of genetic causes (Ashaharraza & Lalremsangha, 2020). An example of this abnormal coloring is leucism, which typically presents as a partial loss of pigmentation (Lobo & Sreepada, 2016).

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