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This beautiful south East Asian snake is unique!It possess a pair of specialised glands called nuchal glands under the skin of neck region which secrete bufadienolides which is related to digitalis,and thus cardiotoxic.It acquires the toxin by consuming toads secreting it. First described in a Japanese natricine snake, Rhabdophis tigrinus, in 1935, these organs are embedded under the skin of the neck region as a series of paired glands that have neither lumina nor ducts. Spotted it in Khao Sok National Park during my hike.