The informal term "big cats" is used for the four biggest cats that roar: tigers, lions, jaguars, and leopards (from largest to smallest), but often the cougar and cheetah are included, although these last two don't roar.
black panther melanistic color variant of a jaguar or leopard
Letter J jaguar activities
jaguar *About 6% are black (color morphism), & are known as 'black panthers'
[various] *Due to color morphism the fur may appear black, & are known as 'black panthers'
Other Wild Cats:
cougar Also known as: Panther - Puma - Mountain Lion