IFS officer Parveen Kaswan has shared a picture of a king cobra eating a spectacled cobra and tweeted, "They feed on lesser mortals." "Scientific name of king cobra is: Ophiophagus hannah. 'Ophiophagus' is derived from Greek, meaning 'snake-eating' and hannah is derived from the name of tree-dwelling nymphs in Greek mythology. So king living true to its name," he added.