There are many occurrences of "multi-headed" animals, in real life as well as in mythology. In heraldry and vexillology, the double-headed eagle is a common symbol, though no such animal is known to have ever existed.
"Bicephalic" or "tricephalic" animals are the only type of multi-headed creatures seen in the real world and form by the same process as conjoined twins: they all result from the failed separation of monozygotic twins. One extreme example of this is the condition of craniopagus parasiticus, whereby a fully developed body has a parasitic twin head joined at the skull.
Snake with ten heads, its true they found this in Sri Lanka
|"10 headed snake"|
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