Jaguar and Leopard are same!!

[Vinay]

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Color : Almost Same 

Body structure  : Almost Same (Jag little bigger) 

Weight  : Almost Same  (Jag little bigger) 

Melanin : Same (Note: Not in any-other Cats)

If necessary both cats can hunt in water

Coat : Only difference is few dots 

My theory : In Asia Persian and Srilankan leopards are little bigger than their neighbor Indian leopards ...... Why because they don't face Dhole-Wolf Packs,Bears, Asiatic Lions and most importantly thier BIG DADDY-Bengal Tigers (it even climb trees and kills him  ).So, Indian leopards are mostly stick to trees like monkeys unlike Persian and lankan leopards which are ALPHA in their region and little bigger.   

Same goes to Jaguars,because of almost zero competition in South America Leopards became little bigger and now they are called as Jaguars.

or 

They were evolved from Asian leopards (Siberia  to Alaska to South America) like Barbary/Indian lions evolved from African lions Reply