Nagini etymology + snakes' lifespan?

[Krycha Kowalska]

No: HPFGUIDX 146199


brian dumby <briandumby at yahoo.com> wrote:
   
  "Well have been seeing these messages for sometime and I thought about sharing my knowledge about this "Nagini" name.

Yes, as people have mentioned the boa and Nagini are totally different. Boa is a non-venomous constrictor while Nagini is a venomous cobra. Nagini is a name derived from Indian word Nag (meaning cobra) and the suffix -ini denoting the female of the species."

  Krystyna:
   
  In one of the stories of "Jungle Book" by Rudyard Kipling there is a couple of cobras - Nag (male) and Nagaina (female). Both deadly dangerous, but the female more evil and vicious than her husband. 
   
  brian:
"But cobras are far from green... generally they are brown-black with a sheen. So obviously JKR has picked up an ugly looking green colour, added the diamond patterned tail (chracteristic of diamond-backed rattle snake or a diamondback water snake) and christened it with an Indian name. And also made it 12 feet long. King cobra - a distinct venomous snake (different from the normal cobra) is the longest venomous snake known around with lengths of 12 feet or more. Sure there are other long snakes but mostly in the the non-venomous category like pythons, anaconda etc.

Krystyna:
  Now to my question. What do we know about average lifespan of snakes? I wonder if Voldemort isn't risking too much by placing precious piece of his soul into animal with its natural limitations. Or is Nagini now living according to human rather than snake's lifespan - I mean, bearing Voldemort's soul, she is no longer prone to snake aging process??
   
  Hope you will got my message, even with my poor English.
   
  Krystyna